null or not an object

cisco999 · Jun 26, 2007

The following script generates a "null or not an object" on line 4. I've used this syntax before to retrieve a value from the page. I'm not seeing the problem. Thanks for the help!

<HTML>
<HEAD>
<script language="JavaScript">
alert('Update successful for PO '+document.myForm.po.value);</script>
</HEAD>
<BODY>
<FORM name="myForm" method="post">
<DIV align="center">
<SPAN name="namedTag"></SPAN>
<SPAN name="po_text">PP40141</SPAN><input name="po" type="hidden" value='PP40141'>
</DIV>
</FORM>
</BODY>
</HTML>

adam0101 · Jun 26, 2007

That's because it doesn't exist yet. Wait until after it has loaded before calling it:

Code:

<HTML>
<HEAD>
<script language="JavaScript">
[red]function init(){[/red]
            alert('Update successful for PO '+document.myForm.po.value);
[red]}[/red]
</script>
</HEAD>
<BODY[red] onload="init()"[/red]>
<FORM name="myForm" method="post">
            <DIV align="center"> 
            <SPAN name="namedTag"></SPAN> 
            <SPAN name="po_text">PP40141</SPAN><input name="po" type="hidden" value='PP40141'> 
            </DIV> 
</FORM>
</BODY>
</HTML>

Adam
http://adameslinger.blogspot.com/

cisco999 · Jun 26, 2007

That was too easy! I was looking at it too long. Many thanks!

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null or not an object

cisco999

Programmer

adam0101

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cisco999

Programmer

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