[RESOLVED] Object Expected when Using getElementById on a Select

**WarrenGaebel** · 07-21-2010, 01:01 PM

This code generates an "objected expected" error when I select the unselected option in the list.

Code:

<html><head>
<script type="text/javascript">
function wgxx() {
    var temp = getElementById ("zzzz");
}
</script>
</head><body>
<form action="abcd.php">
    <select id="zzzz" onChange="wgxx()">
    <option>1</option>
    <option>2</option>
    </select>
</form>
</body></html>

Does anyone have any idea why this is happening?

**coothead** · 07-21-2010, 01:22 PM

Hi there WarrenGaebel,

does this help...

Code:


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
   "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="language" content="english"> 
<meta http-equiv="Content-Style-Type" content="text/css">
<meta http-equiv="Content-Script-Type" content="text/javascript">

<title></title>

<style type="text/css"></style>

<script type="text/javascript">

function init(){
document.getElementById('zzzz').onchange=function(){
   wgxx();
  }
 }

function wgxx() {
    var temp=document.getElementById('zzzz');
    alert(temp);
    alert(temp.tagName);
 }

if(window.addEventListener){
   window.addEventListener('load',init,false);
 }
else { 
if(window.attachEvent){
   window.attachEvent('onload',init);
  }
 }
</script>

</head>
<body>

<form action="abcd.php">
<div>
<select id="zzzz">
 <option value="1">1</option>
 <option value="2">2</option>
</select>
</div>
</form>

</body>
</html>

coothead

**WarrenGaebel** · 07-21-2010, 01:28 PM

Thank-you for your solution. I did not put "document." in front of "getElementById". The following works fine:

Code:

<html><head>
<script type="text/javascript">
function wgxx() {
    var temp = document.getElementById ("zzzz");
}
</script>
</head><body>
<form action="abcd.php">
    <select id="zzzz" onChange="wgxx()">
    <option>1</option>
    <option>2</option>
    </select>
</form>
</body></html>