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Editorial Team
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Asked: 2026-05-25T16:17:58+00:00

I come from MVC background and I have little experience with web forms. I

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I come from MVC background and I have little experience with web forms.

I have established where the problem is, but so far I have been unable to fix this.

I have a form which is meant to execute Javascript function when body of the form loads. Please notice that head tag has a run at server attribute as it needs to use Request.QueryString.

The code is below:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    
<script type="text/javascript">

    function doSomething()
    {
        // Use web forms to do something
        var foo = <%= Request.QueryString["input"] %>;
    }
    
</script>
<title>Foo</title>
</head>
<body onload="doSomething()">
    <form id="MainForm" runat="server">
    <table width="272px" border="0" cellpadding="0" cellspacing="0">
        <tr>
            <td class="body">
                ...
            </td>
        </tr>
    </table>
    </form>
</body>
</html>

I get the following error:

SCRIPT5007: The value of the property doSomething is null or undefined, not a Function object.

My guess is that something executes on a server or other way round. This has worked previously (over a year ago), so potentially something in a web config was overwritten. I have spent the most of day on this and had no luck so far.

Edit: Generated output is below

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    
<script type="text/javascript">

    function doSomething()
    {
        debugger;                 
        var o = crmForm.queryString;    
    }
    
</script>


    <title></title>
</head>
<body onload="doSomething()">
    <form name="MainForm" method="post" action="fooPage.aspx?input=queryString" id="MainForm">
<div>
// hidden fields
    <table width="272px" border="0" cellpadding="0" cellspacing="0">
        <tr>
            <td class="body">
                // inputs
            </td>
        </tr>
    </table>
    


</form>
</body>
</html>
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1 Answer

  1. Editorial Team

    Instead of using the onload attribute of the body tag, you can also add the following code within the <script> tags:

    if(window.addEventListener) window.addEventListener("load", doSomething, true);
else window.onload = doSomething;
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