Page throws JavaScript runtime error: 'Function name' is undefined. IE10 only

Question

While working on IE10, I have found that the JavaScript functions which are registered or called from the code behind are throwing exception:

"JavaScript runtime error: 'function name' is undefined".

For ex: Code behind in the (!IsPostBack) block:

Page.RegisterStartupScript("showGCAlert", "<script language=\"javascript\">ShowGCAlert();</script>");

PageView:

function ShowGCAlert()
    {

        alert('GCAlert');
        if(document.getElementById('hdnGCAlert').value != "1")
        {
            document.getElementById('divGCAlert').style.display = "Block";
            document.getElementById('chkReminder').focus();
            document.getElementById('btnLogin').disabled = true;
            document.getElementById('Button2').disabled = true;             

        }
        else
        {
            document.getElementById('divGCAlert').style.display = "none";
            document.getElementById('btnLogin').disabled = false;
            document.getElementById('Button2').disabled = false;                
            if (document.getElementById("txtUsername").value != "")
                document.getElementById("txtPassword").focus();
            else
                document.getElementById("txtUsername").focus();
        }

    }

When the page loads its throws the exception even though the ShowGCAlert() exists on the dynamic page.

After continuing the exception design page shows:

<script language="javascript" src="/ABC/DEF/Scripts/Common.js"></script>
<script language="javascript">
    document.body.style.overflowY="hidden";
    document.body.style.overflowX="hidden";
    var jsAppName ='ABC';
</script>
<script language="javascript">
    function window.onresize() 
    { 
        document.cookie = "resX=" 
                        + document.body.clientWidth 
                        + ";resY=" 
                        + document.body.clientHeight 
                        + ";path=/"; 
    } 
    window.onresize();
</script>
<script type="javascript">
      ShowGCAlert();
</script>
<script language="javascript">
    document.getElementById('txtPassword').focus();
</script>

In ie9 or IE10 compatibility view its working fine. Please show me where i am doing wrong.

Have you tried using the non-deprecated version inside of ClientScriptManager http://msdn.microsoft.com/en-us/library/asz8zsxy%28v=vs.110%29.aspx — Louis Ricci, Nov 20 '13 at 15:39
@LastCoder Yes, just now i have used this.. but still showing the exception. — Maybe2013, Nov 20 '13 at 16:12

Murali Murugesan · Accepted Answer · 2013-11-20T16:25:03.653

1

Try placing the script at the end of the page using RegisterClientScriptBlock and call it.

   Page.ClientScript.RegisterClientScriptBlock("showGCAlert", 
     "<script type=\"text/javascript\">ShowGCAlert();</script>");

edited Nov 20 '13 at 16:25

answered Nov 20 '13 at 15:36

Murali Murugesan

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Still giving the exception. – Maybe2013 Nov 20 '13 at 15:53
@Maybe2013, could you please check the view source and tell us where the function call and function is placed? – Murali Murugesan Nov 20 '13 at 15:54
Updated the ques.. please see if this is you want? – Maybe2013 Nov 20 '13 at 16:12
And if alert('hi') is called from the RegisterStartupScript then its not giving the exception. – Maybe2013 Nov 20 '13 at 16:15
@Maybe2013, changed the language to `type=text/javascript` in my answer. Try it – Murali Murugesan Nov 20 '13 at 16:25
thanx for the answer. after updating code, now the exception does'nt show but inside the ShowGCAlert()...alert('hi') is written and it dint show the HI message on page load. – Maybe2013 Nov 20 '13 at 16:32
@Maybe2013, make sure you calling the function `ShowGCAlert();` with `;` also show us the code inside `ShowGCAlert` – Murali Murugesan Nov 20 '13 at 16:35
@Maybe2013, Thats cool. Check this[post](http://stackoverflow.com/questions/6771258/whats-the-difference-if-meta-http-equiv-x-ua-compatible-content-ie-edge-e) if you want to force a browser to choose a mode – Murali Murugesan Nov 21 '13 at 10:42

Page throws JavaScript runtime error: 'Function name' is undefined. IE10 only

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