Javascript Regex Problem with space

Question

I am using this home-made function to validate text fields, but for some reason, it doesn't "accept" spaces. I find that weird, since I have \s in my class...

function validateText(controlid, minlength, maxlength, required) {
    var control = document.getElementById(controlid);
    if (!required && control.value.length == 0) control.style.backgroundColor = "White";
    else {
        var regex = new RegExp("^[a-zA-Z0-9\(\)\.\s_,:/-]{" + minlength + "," + maxlength + "}$", "g");
        if (!regex.test(control.value))
            control.style.backgroundColor = "#FFDDDD";
        else
            control.style.backgroundColor = "White";
    }
}

Can you tell me why entering a space turns the textbox red? Thanks :)

@Jesper - I made a demo, and working fine. hope some help ~ http://jsfiddle.net/5ryx8/ — Monday
– Monday, Commented Jul 28, 2011 at 4:18

Sajid · Accepted Answer · 2011-07-28 03:32:41Z

3

I believe it's because you're trying to put \s in a class. Inside a class (eg, []) \s is simple a badly-escaped "s". Either use a literal space, or do ^([...]|\s){.

answered Jul 28, 2011 at 3:32

Sajid

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1 Comment

jfriend00 Over a year ago

Yes, if you replace the \s with a space, it works. You can see it work here in the jsFiddle: jsfiddle.net/jfriend00/Ne6zC.

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