ReferenceError: variable not defined

Question

I'm new b to JS, any help would be appreciated

have following code

<head>
  <script language="Javascript">
      function my(eve)
      {
        // Internet Explorer
        if (eve.srcElement)
        {
          alert(eve.srcElement.nodeName);
        }
        // Netscape and Firefox
          else if (eve.target)
        {
          alert(eve.target.nodeName);
        }
      };
</script>
</head>
<body onmousemove="my(eve);">
  //Some HTML code
</body>

Getting Error in FF Console while moving mouse over the browser window-

"ReferenceError: eve is not defined

my(eve);"

Did you mean event?

c.P.u1
– c.P.u1

2013-07-12 12:21:31 +00:00
Commented Jul 12, 2013 at 12:21 — c.P.u1
– c.P.u1, Commented Jul 12, 2013 at 12:21

nnnnnn · Accepted Answer · 2013-07-12 12:27:11Z

3

You probably meant to do this:

<body onmousemove="my(event);">

That is, you wanted to pass the event object to your my() function. Then within that function you can refer to it by the eve variable. (Note that it is very common to define an event variable with the name e rather than eve - a matter of preference, it'll work either way.)

Also your closing script tag is incorrect, you should have </script> not <script>.

Working demo: http://jsbin.com/oyoqeg/1/edit

(Note that displaying an alert on mousemove makes the page pretty much unusable, but that's another issue.)

edited Jul 12, 2013 at 12:27

answered Jul 12, 2013 at 12:21

nnnnnn

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1 Comment

Chandrakant Over a year ago

Thank you it works for me, and for closing tag- apologies for same - it was typo mistake

Sergio · Accepted Answer · 2013-07-12 12:22:07Z

2

You have to define "eve" first. If eve is text you should use my('eve'), if eve is a variable you need to define it first with var eve =... ;

Otherwise if you might want to use event or this. my(event) or my(this).

answered Jul 12, 2013 at 12:22

Sergio

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