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var byBook = {};
var size = 0;
var result = [];
//var getprob = [];
//var redo = [];
//var sets = [];

function loadJson()
{
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() 
    {
        if (this.readyState == 4 && this.status == 200) 
        {
            result = JSON.parse(this.responseText);
            size = result.length;
            for (var i = 0; i < result.length; i++)
            {
                var numv = parseInt(result[i].numVerses);
                if (numv < 0 || numv > 5)
                    continue;
                    
                getprob.push([result[i].ques, result[i].ans]);
                if (Object.keys(byBook).indexOf(result[i].Book) != -1)
                    byBook[result[i].Book].push(i);
                else
                {
                    byBook[result[i].Book] = [];
                    byBook[result[i].Book].push(i);
                }
            }
            size = getprob.length;
            init();
        }
    };
    xmlhttp.open("GET", "faith.json", true);
    xmlhttp.send();
}

function init()
{
    sets = [];
    redo = [];  
    
    var url = window.location.toString();
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value;

    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    size = getprob.length;
    
    for (var i = 0; i < size; i++)
    {
        var x = document.getElementById("start");
        var option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i === 0)
            option.selected = true;
        x.add(option);
    }

    for (i = 0; i < size; i++)
    {
        x = document.getElementById("end");
        option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i == size-1)
            option.selected = true;
        x.add(option);
    }
    
    //This sets up my sets array. 
    for (i = start; i < end; i++)
        sets[i - start] = i;
    //end of that part.

    document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
    var txtOut = "<div id='match' class='col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='row col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='col-xs-8 col-sm-8 col-md-9 col-lg-9 cL'><INPUT TYPE=checkbox ID=\"chk2\" style=\"visibility:hidden\">";
    document.getElementById("output").innerHTML = "";
    
    getnum();
}

function init2()
{
    sets = [];
    redo = [];  
    //This sets up my sets Array. 
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value; 
    
    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    
    
    //This sets up my sets array. 
    for(var i = start; i < end; i++)
        sets[i - start] = i;
    //End of that part. 

    getnum();
}

function getques()
{
    cans = getprob[hist[curr-1]][0] + " - " + getprob[hist[curr-1]][1]; //curr is always at least 1, so curr-1 cannot return a negative number. 
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + cans
    if (curr >= 2)
    {
        lques = getprob[hist[curr-2]][0];
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1>" + hist[curr-1] + ") " + lques;
        curr--;
        curr--;
    }
    else
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1 style=\"visibility:hidden\">";
}

function getans2(num)
{
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + last[0] + " - " + last[1];
}

function getnum()
{
    var quest = [];
    if (sets.length === 0 && redo.length === 0)
        init2();
    else if (sets.length === 0 && redo.length !== 0)
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(redo.length*Math.random()+1);         //gets a new problem number. 
            hist[hist.length] = ans2;
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            var temp = redo[ans2-1];
            redo[ans2-1] = redo[redo.length-1];
            redo[length-1] = temp;
            delete redo[redo.length-1];
            redo.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + redo.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            curr++;
        }
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
    else
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(sets.length*Math.random());           //gets a new problem number. 
            hist.push(ans2);
            quest = getprob[sets[ans2]];                    //looks up the specified problem number.
            var temp = sets[ans2-1];
            sets[ans2-1] = sets[sets.length-1];
            sets[length-1] = temp;
            delete sets[sets.length-1];
            sets.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[ans2];                  //looks up the specified problem number.
            curr++;
        }
        
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
}

function updateRedo()
{
    var chk1 = document.getElementById("chk1");
    var chk2 = document.getElementById("chk2");

    if (chk1 != null && chk1.checked == true && redo[redo.length] != ans2)
        redo[redo.length] = ans2;
    else if (chk1 != null && chk1.checked == false && redo[redo.length] == ans2)
        delete redo[redo.length];
    
    if (chk2 != null && chk2.checked == true && redo[redo.length] != num)
        redo[redo.length] = num;
    else if (chk2 != null && chk2.checked == false && redo[redo.length] == ans2-1)
        delete redo[redo.length];
    
    getans2();
    getnum();
}

[![enter image description here][1]][1]

This is a look at what the flash page should look like when its up and running. [1]: https://i.sstatic.net/wjtspOjY.png//

var size = 0;
var result = [];
var getprob = [];
var redo = [];
var sets = [];

function loadJson()
{
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() 
    {
        if (this.readyState == 4 && this.status == 200) 
        {
            result = JSON.parse(this.responseText);
            size = result.length;
            for (var i = 0; i < result.length; i++)
            {
                var numv = parseInt(result[i].numVerses);
                if (numv < 0 || numv > 5)
                    continue;
                    
                getprob.push([result[i].ques, result[i].ans]);
                if (Object.keys(byBook).indexOf(result[i].Book) != -1)
                    byBook[result[i].Book].push(i);
                else
                {
                    byBook[result[i].Book] = [];
                    byBook[result[i].Book].push(i);
                }
            }
            size = getprob.length;
            init();
        }
    };
    xmlhttp.open("GET", "faith.json", true);
    xmlhttp.send();
}

function init()
{
    sets = [];
    redo = [];  
    
    var url = window.location.toString();
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value;

    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    size = getprob.length;
    
    for (var i = 0; i < size; i++)
    {
        var x = document.getElementById("start");
        var option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i === 0)
            option.selected = true;
        x.add(option);
    }

    for (i = 0; i < size; i++)
    {
        x = document.getElementById("end");
        option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i == size-1)
            option.selected = true;
        x.add(option);
    }
    
    //This sets up my sets array. 
    for (i = start; i < end; i++)
        sets[i - start] = i;
    //end of that part.

    document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
    var txtOut = "<div id='match' class='col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='row col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='col-xs-8 col-sm-8 col-md-9 col-lg-9 cL'><INPUT TYPE=checkbox ID=\"chk2\" style=\"visibility:hidden\">";
    document.getElementById("output").innerHTML = "";
    
    getnum();
}

function init2()
{
    sets = [];
    redo = [];  
    //This sets up my sets Array. 
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value; 
    
    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    
    
    //This sets up my sets array. 
    for(var i = start; i < end; i++)
        sets[i - start] = i;
    //End of that part. 

    getnum();
}

function getques()
{
    cans = getprob[hist[curr-1]][0] + " - " + getprob[hist[curr-1]][1]; //curr is always at least 1, so curr-1 cannot return a negative number. 
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + cans
    if (curr >= 2)
    {
        lques = getprob[hist[curr-2]][0];
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1>" + hist[curr-1] + ") " + lques;
        curr--;
        curr--;
    }
    else
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1 style=\"visibility:hidden\">";
}

function getans2(num)
{
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + last[0] + " - " + last[1];
}

function getnum()
{
    var quest = [];
    if (sets.length === 0 && redo.length === 0)
        init2();
    else if (sets.length === 0 && redo.length !== 0)
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(redo.length*Math.random()+1);         //gets a new problem number. 
            hist[hist.length] = ans2;
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            var temp = redo[ans2-1];
            redo[ans2-1] = redo[redo.length-1];
            redo[length-1] = temp;
            delete redo[redo.length-1];
            redo.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + redo.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            curr++;
        }
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
    else
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(sets.length*Math.random());           //gets a new problem number. 
            hist.push(ans2);
            quest = getprob[sets[ans2]];                    //looks up the specified problem number.
            var temp = sets[ans2-1];
            sets[ans2-1] = sets[sets.length-1];
            sets[length-1] = temp;
            delete sets[sets.length-1];
            sets.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[ans2];                  //looks up the specified problem number.
            curr++;
        }
        
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
}

function updateRedo()
{
    var chk1 = document.getElementById("chk1");
    var chk2 = document.getElementById("chk2");

    if (chk1 != null && chk1.checked == true && redo[redo.length] != ans2)
        redo[redo.length] = ans2;
    else if (chk1 != null && chk1.checked == false && redo[redo.length] == ans2)
        delete redo[redo.length];
    
    if (chk2 != null && chk2.checked == true && redo[redo.length] != num)
        redo[redo.length] = num;
    else if (chk2 != null && chk2.checked == false && redo[redo.length] == ans2-1)
        delete redo[redo.length];
    
    getans2();
    getnum();
}

var byBook = {};
var size = 0;
var result = [];
var getprob = [];
var redo = [];
var sets = [];

function loadJson()
{
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() 
    {
        if (this.readyState == 4 && this.status == 200) 
        {
            result = JSON.parse(this.responseText);
            size = result.length;
            for (var i = 0; i < result.length; i++)
            {
                var numv = parseInt(result[i].numVerses);
                if (numv < 0 || numv > 5)
                    continue;
                    
                getprob.push([result[i].ques, result[i].ans]);
                if (Object.keys(byBook).indexOf(result[i].Book) != -1)
                    byBook[result[i].Book].push(i);
                else
                {
                    byBook[result[i].Book] = [];
                    byBook[result[i].Book].push(i);
                }
            }
            size = getprob.length;
            init();
        }
    };
    xmlhttp.open("GET", "faith.json", true);
    xmlhttp.send();
}

function init()
{
    sets = [];
    redo = [];  
    
    var url = window.location.toString();
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value;

    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    size = getprob.length;
    
    for (var i = 0; i < size; i++)
    {
        var x = document.getElementById("start");
        var option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i === 0)
            option.selected = true;
        x.add(option);
    }

    for (i = 0; i < size; i++)
    {
        x = document.getElementById("end");
        option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i == size-1)
            option.selected = true;
        x.add(option);
    }
    
    //This sets up my sets array. 
    for (i = start; i < end; i++)
        sets[i - start] = i;
    //end of that part.

    document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
    var txtOut = "<div id='match' class='col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='row col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='col-xs-8 col-sm-8 col-md-9 col-lg-9 cL'><INPUT TYPE=checkbox ID=\"chk2\" style=\"visibility:hidden\">";
    document.getElementById("output").innerHTML = "";
    
    getnum();
}

function init2()
{
    sets = [];
    redo = [];  
    //This sets up my sets Array. 
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value; 
    
    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    
    
    //This sets up my sets array. 
    for(var i = start; i < end; i++)
        sets[i - start] = i;
    //End of that part. 

    getnum();
}

function getques()
{
    cans = getprob[hist[curr-1]][0] + " - " + getprob[hist[curr-1]][1]; //curr is always at least 1, so curr-1 cannot return a negative number. 
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + cans
    if (curr >= 2)
    {
        lques = getprob[hist[curr-2]][0];
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1>" + hist[curr-1] + ") " + lques;
        curr--;
        curr--;
    }
    else
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1 style=\"visibility:hidden\">";
}

function getans2(num)
{
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + last[0] + " - " + last[1];
}

function getnum()
{
    var quest = [];
    if (sets.length === 0 && redo.length === 0)
        init2();
    else if (sets.length === 0 && redo.length !== 0)
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(redo.length*Math.random()+1);         //gets a new problem number. 
            hist[hist.length] = ans2;
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            var temp = redo[ans2-1];
            redo[ans2-1] = redo[redo.length-1];
            redo[length-1] = temp;
            delete redo[redo.length-1];
            redo.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + redo.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            curr++;
        }
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
    else
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(sets.length*Math.random());           //gets a new problem number. 
            hist.push(ans2);
            quest = getprob[sets[ans2]];                    //looks up the specified problem number.
            var temp = sets[ans2-1];
            sets[ans2-1] = sets[sets.length-1];
            sets[length-1] = temp;
            delete sets[sets.length-1];
            sets.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[ans2];                  //looks up the specified problem number.
            curr++;
        }
        
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
}

function updateRedo()
{
    var chk1 = document.getElementById("chk1");
    var chk2 = document.getElementById("chk2");

    if (chk1 != null && chk1.checked == true && redo[redo.length] != ans2)
        redo[redo.length] = ans2;
    else if (chk1 != null && chk1.checked == false && redo[redo.length] == ans2)
        delete redo[redo.length];
    
    if (chk2 != null && chk2.checked == true && redo[redo.length] != num)
        redo[redo.length] = num;
    else if (chk2 != null && chk2.checked == false && redo[redo.length] == ans2-1)
        delete redo[redo.length];
    
    getans2();
    getnum();
}

var byBook = {};
var size = 0;
var result = [];
//var getprob = [];
//var redo = [];
//var sets = [];

function loadJson()
{
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() 
    {
        if (this.readyState == 4 && this.status == 200) 
        {
            result = JSON.parse(this.responseText);
            size = result.length;
            for (var i = 0; i < result.length; i++)
            {
                var numv = parseInt(result[i].numVerses);
                if (numv < 0 || numv > 5)
                    continue;
                    
                getprob.push([result[i].ques, result[i].ans]);
                if (Object.keys(byBook).indexOf(result[i].Book) != -1)
                    byBook[result[i].Book].push(i);
                else
                {
                    byBook[result[i].Book] = [];
                    byBook[result[i].Book].push(i);
                }
            }
            size = getprob.length;
            init();
        }
    };
    xmlhttp.open("GET", "faith.json", true);
    xmlhttp.send();
}

function init()
{
    sets = [];
    redo = [];  
    
    var url = window.location.toString();
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value;

    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    size = getprob.length;
    
    for (var i = 0; i < size; i++)
    {
        var x = document.getElementById("start");
        var option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i === 0)
            option.selected = true;
        x.add(option);
    }

    for (i = 0; i < size; i++)
    {
        x = document.getElementById("end");
        option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i == size-1)
            option.selected = true;
        x.add(option);
    }
    
    //This sets up my sets array. 
    for (i = start; i < end; i++)
        sets[i - start] = i;
    //end of that part.

    document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
    var txtOut = "<div id='match' class='col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='row col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='col-xs-8 col-sm-8 col-md-9 col-lg-9 cL'><INPUT TYPE=checkbox ID=\"chk2\" style=\"visibility:hidden\">";
    document.getElementById("output").innerHTML = "";
    
    getnum();
}

function init2()
{
    sets = [];
    redo = [];  
    //This sets up my sets Array. 
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value; 
    
    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    
    
    //This sets up my sets array. 
    for(var i = start; i < end; i++)
        sets[i - start] = i;
    //End of that part. 

    getnum();
}

function getques()
{
    cans = getprob[hist[curr-1]][0] + " - " + getprob[hist[curr-1]][1]; //curr is always at least 1, so curr-1 cannot return a negative number. 
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + cans
    if (curr >= 2)
    {
        lques = getprob[hist[curr-2]][0];
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1>" + hist[curr-1] + ") " + lques;
        curr--;
        curr--;
    }
    else
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1 style=\"visibility:hidden\">";
}

function getans2(num)
{
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + last[0] + " - " + last[1];
}

function getnum()
{
    var quest = [];
    if (sets.length === 0 && redo.length === 0)
        init2();
    else if (sets.length === 0 && redo.length !== 0)
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(redo.length*Math.random()+1);         //gets a new problem number. 
            hist[hist.length] = ans2;
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            var temp = redo[ans2-1];
            redo[ans2-1] = redo[redo.length-1];
            redo[length-1] = temp;
            delete redo[redo.length-1];
            redo.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + redo.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            curr++;
        }
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
    else
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(sets.length*Math.random());           //gets a new problem number. 
            hist.push(ans2);
            quest = getprob[sets[ans2]];                    //looks up the specified problem number.
            var temp = sets[ans2-1];
            sets[ans2-1] = sets[sets.length-1];
            sets[length-1] = temp;
            delete sets[sets.length-1];
            sets.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[ans2];                  //looks up the specified problem number.
            curr++;
        }
        
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
}

function updateRedo()
{
    var chk1 = document.getElementById("chk1");
    var chk2 = document.getElementById("chk2");

    if (chk1 != null && chk1.checked == true && redo[redo.length] != ans2)
        redo[redo.length] = ans2;
    else if (chk1 != null && chk1.checked == false && redo[redo.length] == ans2)
        delete redo[redo.length];
    
    if (chk2 != null && chk2.checked == true && redo[redo.length] != num)
        redo[redo.length] = num;
    else if (chk2 != null && chk2.checked == false && redo[redo.length] == ans2-1)
        delete redo[redo.length];
    
    getans2();
    getnum();
}

[![enter image description here][1]][1]

This is a look at what the flash page should look like when its up and running. [1]: https://i.sstatic.net/wjtspOjY.png//

var size = 0;
var result = [];
var getprob = [];
var redo = [];
var sets = [];

function loadJson()
{
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() 
    {
        if (this.readyState == 4 && this.status == 200) 
        {
            result = JSON.parse(this.responseText);
            size = result.length;
            for (var i = 0; i < result.length; i++)
            {
                var numv = parseInt(result[i].numVerses);
                if (numv < 0 || numv > 5)
                    continue;
                    
                getprob.push([result[i].ques, result[i].ans]);
                if (Object.keys(byBook).indexOf(result[i].Book) != -1)
                    byBook[result[i].Book].push(i);
                else
                {
                    byBook[result[i].Book] = [];
                    byBook[result[i].Book].push(i);
                }
            }
            size = getprob.length;
            init();
        }
    };
    xmlhttp.open("GET", "faith.json", true);
    xmlhttp.send();
}

function init()
{
    sets = [];
    redo = [];  
    
    var url = window.location.toString();
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value;

    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    size = getprob.length;
    
    for (var i = 0; i < size; i++)
    {
        var x = document.getElementById("start");
        var option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i === 0)
            option.selected = true;
        x.add(option);
    }

    for (i = 0; i < size; i++)
    {
        x = document.getElementById("end");
        option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i == size-1)
            option.selected = true;
        x.add(option);
    }
    
    //This sets up my sets array. 
    for (i = start; i < end; i++)
        sets[i - start] = i;
    //end of that part.

    document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
    var txtOut = "<div id='match' class='col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='row col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='col-xs-8 col-sm-8 col-md-9 col-lg-9 cL'><INPUT TYPE=checkbox ID=\"chk2\" style=\"visibility:hidden\">";
    document.getElementById("output").innerHTML = "";
    
    getnum();
}

function init2()
{
    sets = [];
    redo = [];  
    //This sets up my sets Array. 
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value; 
    
    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    
    
    //This sets up my sets array. 
    for(var i = start; i < end; i++)
        sets[i - start] = i;
    //End of that part. 

    getnum();
}

function getques()
{
    cans = getprob[hist[curr-1]][0] + " - " + getprob[hist[curr-1]][1]; //curr is always at least 1, so curr-1 cannot return a negative number. 
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + cans
    if (curr >= 2)
    {
        lques = getprob[hist[curr-2]][0];
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1>" + hist[curr-1] + ") " + lques;
        curr--;
        curr--;
    }
    else
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1 style=\"visibility:hidden\">";
}

function getans2(num)
{
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + last[0] + " - " + last[1];
}

function getnum()
{
    var quest = [];
    if (sets.length === 0 && redo.length === 0)
        init2();
    else if (sets.length === 0 && redo.length !== 0)
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(redo.length*Math.random()+1);         //gets a new problem number. 
            hist[hist.length] = ans2;
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            var temp = redo[ans2-1];
            redo[ans2-1] = redo[redo.length-1];
            redo[length-1] = temp;
            delete redo[redo.length-1];
            redo.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + redo.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            curr++;
        }
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
    else
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(sets.length*Math.random());           //gets a new problem number. 
            hist.push(ans2);
            quest = getprob[sets[ans2]];                    //looks up the specified problem number.
            var temp = sets[ans2-1];
            sets[ans2-1] = sets[sets.length-1];
            sets[length-1] = temp;
            delete sets[sets.length-1];
            sets.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[ans2];                  //looks up the specified problem number.
            curr++;
        }
        
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
}

function updateRedo()
{
    var chk1 = document.getElementById("chk1");
    var chk2 = document.getElementById("chk2");

    if (chk1 != null && chk1.checked == true && redo[redo.length] != ans2)
        redo[redo.length] = ans2;
    else if (chk1 != null && chk1.checked == false && redo[redo.length] == ans2)
        delete redo[redo.length];
    
    if (chk2 != null && chk2.checked == true && redo[redo.length] != num)
        redo[redo.length] = num;
    else if (chk2 != null && chk2.checked == false && redo[redo.length] == ans2-1)
        delete redo[redo.length];
    
    getans2();
    getnum();
}

var byBook = {};
var size = 0;
var result = [];
var getprob = [];
var redo = [];
var sets = [];

function loadJson()
{
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function() 
    {
        if (this.readyState == 4 && this.status == 200) 
        {
            result = JSON.parse(this.responseText);
            size = result.length;
            for (var i = 0; i < result.length; i++)
            {
                var numv = parseInt(result[i].numVerses);
                if (numv < 0 || numv > 5)
                    continue;
                    
                getprob.push([result[i].ques, result[i].ans]);
                if (Object.keys(byBook).indexOf(result[i].Book) != -1)
                    byBook[result[i].Book].push(i);
                else
                {
                    byBook[result[i].Book] = [];
                    byBook[result[i].Book].push(i);
                }
            }
            size = getprob.length;
            init();
        }
    };
    xmlhttp.open("GET", "faith.json", true);
    xmlhttp.send();
}

function init()
{
    sets = [];
    redo = [];  
    
    var url = window.location.toString();
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value;

    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    size = getprob.length;
    
    for (var i = 0; i < size; i++)
    {
        var x = document.getElementById("start");
        var option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i === 0)
            option.selected = true;
        x.add(option);
    }

    for (i = 0; i < size; i++)
    {
        x = document.getElementById("end");
        option = document.createElement("option");
        option.text = i;
        option.value = i;
        if (i == size-1)
            option.selected = true;
        x.add(option);
    }
    
    //This sets up my sets array. 
    for (i = start; i < end; i++)
        sets[i - start] = i;
    //end of that part.

    document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
    var txtOut = "<div id='match' class='col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='row col-xs-12 col-sm-12 col-md-12 col-lg-12'><div class='col-xs-8 col-sm-8 col-md-9 col-lg-9 cL'><INPUT TYPE=checkbox ID=\"chk2\" style=\"visibility:hidden\">";
    document.getElementById("output").innerHTML = "";
    
    getnum();
}

function init2()
{
    sets = [];
    redo = [];  
    //This sets up my sets Array. 
    var start = document.getElementById("start").value;
    var end = document.getElementById("end").value; 
    
    if (start === null)
    {
        start = 0;
    }
    
    if (end === null)
    {
        end = getprob.length;
    }
    
    
    //This sets up my sets array. 
    for(var i = start; i < end; i++)
        sets[i - start] = i;
    //End of that part. 

    getnum();
}

function getques()
{
    cans = getprob[hist[curr-1]][0] + " - " + getprob[hist[curr-1]][1]; //curr is always at least 1, so curr-1 cannot return a negative number. 
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + cans
    if (curr >= 2)
    {
        lques = getprob[hist[curr-2]][0];
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1>" + hist[curr-1] + ") " + lques;
        curr--;
        curr--;
    }
    else
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1 style=\"visibility:hidden\">";
}

function getans2(num)
{
    document.getElementById("text").innerHTML = "<INPUT TYPE=checkbox ID=chk2 NAME=chk2> Last ans: " + last[0] + " - " + last[1];
}

function getnum()
{
    var quest = [];
    if (sets.length === 0 && redo.length === 0)
        init2();
    else if (sets.length === 0 && redo.length !== 0)
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(redo.length*Math.random()+1);         //gets a new problem number. 
            hist[hist.length] = ans2;
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            var temp = redo[ans2-1];
            redo[ans2-1] = redo[redo.length-1];
            redo[length-1] = temp;
            delete redo[redo.length-1];
            redo.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + redo.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[redo[ans2-1]];                  //looks up the specified problem number.    
            curr++;
        }
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
    else
    {
        if (curr == hist.length)
        {
            ans2 = Math.floor(sets.length*Math.random());           //gets a new problem number. 
            hist.push(ans2);
            quest = getprob[sets[ans2]];                    //looks up the specified problem number.
            var temp = sets[ans2-1];
            sets[ans2-1] = sets[sets.length-1];
            sets[length-1] = temp;
            delete sets[sets.length-1];
            sets.length --;
            ans2 = temp;
            document.getElementById("left").innerHTML = "Questions Left: " + sets.length;
            curr = hist.length;
        }
        else
        {
            ans2 = hist[curr];
            quest = getprob[ans2];                  //looks up the specified problem number.
            curr++;
        }
        
        document.getElementById("text").innerHTML += "<br><br><INPUT TYPE=checkbox ID=chk1 NAME=chk1> " + ans2 + ") " + quest[0];   //Outputs problem number and then the question. 
        last = quest;
    }
}

function updateRedo()
{
    var chk1 = document.getElementById("chk1");
    var chk2 = document.getElementById("chk2");

    if (chk1 != null && chk1.checked == true && redo[redo.length] != ans2)
        redo[redo.length] = ans2;
    else if (chk1 != null && chk1.checked == false && redo[redo.length] == ans2)
        delete redo[redo.length];
    
    if (chk2 != null && chk2.checked == true && redo[redo.length] != num)
        redo[redo.length] = num;
    else if (chk2 != null && chk2.checked == false && redo[redo.length] == ans2-1)
        delete redo[redo.length];
    
    getans2();
    getnum();
}