ASP.NET doPostBack - Error : Expected ';' ?

I have a form which is showing the error as Error : Expected ';' at  the javascript autogenerated by ASP.NET
here is the autogenerated code for your info
====================================
<form name="_ctl0:Default" method="post" action="MyForm.aspx" id="_ctl0_Default">
<input type="hidden" name="__EVENTTARGET" value="" />
<input type="hidden" name="__EVENTARGUMENT" value="" />
<input type="hidden" name="__VIEWSTATE" value="dDw1MDcyNzUzNTY7dDw7bDxpPDI" />

<script language="javascript">
<!--
      function __doPostBack(eventTarget, eventArgument) {
            var theform;
            if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1) {
                  theform = document.forms["_ctl0:Default"];
            }
            else {
                  theform = document._ctl0:Default;
            }
            theform.__EVENTTARGET.value = eventTarget.split("$").join(":");
            theform.__EVENTARGUMENT.value = eventArgument;
            theform.submit();
      }
// -->
</script>
==============================

now the error is showing at the : (colon)
             else {
      theform = document._ctl0:Default;


Iam using Visual Studio 2003 with Framework 1.1,
OS : Windows 2003 Server Standard,
and IE 6

Why iam getting this error and how to rectify this.. Any help would get points immediately
pratap_surisoftAsked:
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pratap_surisoftAuthor Commented:
Hi all, I just have 20 points to ask a question and i given the best, but this question worth 500 points i am sure
mmarinovCommented:
i think that the problem can invoke by the name of the form
can you post the <form> tag

if the id of the form tag is Default it can cause such a problem
if i'm write change the id of the form tag with no usual value

B..G
DekkertCommented:
Hi, try removing all : characters. Also in your form name. Afaik javascript doesn't like colons.
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pratap_surisoftAuthor Commented:
That code was autogenerated by ASP.NET, nothing was done by me..  
mmarinovCommented:
yes,

but it's base on the
<form id="Default" method="post" runat="server"> which is again autogenerated from the vs in your html code of the .aspx

so you have to change the id from Default to something else because Default is reserved

B..G
Rana_blrCommented:
Hi, This is a problem with Framework 1.1,
just add the following code to ur codebehind and it will render the html and your error will go on the fly.
getback to me if it wont goes

using System.IO;
using System.Text;

protected override void Render(HtmlTextWriter writer) {
  StringBuilder stringBuilder = new StringBuilder();
  StringWriter stringWriter = new StringWriter(stringBuilder);
  HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter);
  base.Render(htmlWriter);
  string html = stringBuilder.ToString();

  int start = html.IndexOf("<form name=\"") + 12;
  int end = html.IndexOf("\"", start);
  string formID = html.Substring(start, end - start);
  string replace = formID.Replace(":", "_");
  html = html.Replace("document." + formID, "document." + replace);
  writer.Write(html);
}

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pratap_surisoftAuthor Commented:
Hi All thanks again for your time spent on this question.
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