Problem with Regular Expressions

**TimAnderson** · 01-20-2010, 06:28 PM

I'm trying to determine if the id of an element matches a String that has multiple parts.

Code:

function platformChange (this)
{
   thisID = this.id;

   var pattern = "SWFUpload_\d_\d";
   var match = thisID.match (pattern);
...
}

The value of this.id is "platform_SWFUpload_0_0" but the result of thisID.match (pattern) is null.

Can someone please explain what I'm doing wrong and how I can make this work?

Thanks.

**astupidname** · 01-20-2010, 06:43 PM

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<title>Some Title</title>
<script type="text/javascript">
function platformChange(el){
    thisID = el.id;
     //I'm assuming that you may have wanted to pull the numbers out of the id also:
    var pattern = /^SWFUpload_(\d+)_(\d+)$/;
    var match = thisID.match(pattern);
    var arr = (match !== null) ? match : ['match', 'was', 'null'];
    alert(arr.join('\n'));
}
</script>
</head>
<body>
<div>
<button type="button" id="SWFUpload_10_0" onclick="platformChange(this);">Click Me</button>
</div>
</body>
</html>

**TimAnderson** · 01-20-2010, 06:49 PM

Originally Posted by astupidname

Code:

     //I'm assuming that you may have wanted to pull the numbers out of the id also:

Actually, I'm just trying to match the pattern of SWFUpload_#_# but this gives me something to work with.

Thanks for the quick reply.

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