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How to get value from span element in Firefox?

Posted on 2008-10-24
2
2,406 Views
Last Modified: 2013-12-08
Hi all,

The script below works as expected in IE6 and IE7.  When I try it in FF3, it returns a NaN where IE returns an actual value.  For testing purposes, this script just doubles the selected value in the list and outputs it to a span element.

I've even included an isNaN() test, but it's still not working.

Can anyone make this work in both IE and FF?

Any help much appreciated.

Thank you,

Paul.
<html>
<head>
<script>
function updateprice(labelParam, selectParam, spanParam) { // output area, number selected, item value
// query DOM set for specific elements by ID
var label = document.getElementById(labelParam);
var name = document.getElementById(selectParam).value;
var spanval = parseInt(document.getElementById(spanParam).value);
if (isNaN(name)) { 
	name = "0"; 
	name = parseInt(name); 
	alert("name problem. val: " + name);
}
if (isNaN(spanval)) { 
	spanVal = "0"; 
	spanVal = parseInt(spanVal); 
	alert("spanval problem. val: " + spanVal);
}
var total = parseInt(name)*parseInt(spanval);
msg = "Result: " + total;
label.innerHTML= msg;
}
 
 
</script>
 
<title>Doubler</title>
</head>
 
<body>
<form>
  <p>Doubler:
    <select name="select1" id="select1" onchange="updateprice('output1','select1','item1');">
      <option value="0">0</option>
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
  </p>
</form>
 
<span id="item1" name="item1" value="2"></span><br>
<span id="output1" name="output1"></span><br>
</body>
</html>

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Question by:paulc2000
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2 Comments
 
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hielo earned 500 total points
ID: 22797598
var spanval = parseInt(document.getElementById(spanParam).getAttribute("value"));
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Author Comment

by:paulc2000
ID: 22797646
Short and sweet!  It worked, thank you very much!
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