ASP.NET Javascript Error :: sys.webforms.pagerequestmanagerservererrorexception
- by Andy Evans
I have an ASP.NET site that uses JQuery and ASP.NET UpdatePanel and ScriptManager.  On one page in particular, I get a javascript error:
sys.webforms.pagerequestmanagerservererrorexception: Index and length must refer to a  location within the string.  Parameter name:length
ScriptResourse.axd
Code: 0
Here's what's in the master page:
<asp:ScriptManager runat="server" ID="ScriptMgr"></asp:ScriptManager>
<asp:UpdatePanel runat="server" ID="UpdatePanelMaster">
    <ContentTemplate>
    </ContentTemplate>
</asp:UpdatePanel>
In the page in question:
<asp:Content ID="ContentHeadEdit" ContentPlaceHolderID="ContentHeadMaster" Runat="Server">
    <script type="text/javascript">
    $(document).ready(function() {
        $('#<%= ButtonSave.ClientID %>').button();
        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
        function EndRequestHandler(sender, args) {
            $('#<%= ButtonSave.ClientID %>').button();
        }
    });
    </script>
</asp:Content>