<script language="javascript" type="text/javascript">
            var loadingPanel = "";
            var pageRequestManager = Sys.WebForms.PageRequestManager.getInstance();
            var postBackElement = "";
            pageRequestManager.add_initializeRequest(initializeRequest);
            pageRequestManager.add_endRequest(endRequest);

            function initializeRequest(sender, eventArgs) {
                loadingPanel = $("#<%=LoadingPanel.ClientID%>");
                postBackElement = eventArgs.get_postBackElement().id;
                loadingPanel.show(postBackElement);
            }

            function endRequest(sender, eventArgs) {
                loadingPanel = $("#<%=LoadingPanel.ClientID%>");
                loadingPanel.hide(postBackElement);
            }
        </script>

<telerik:RadCodeBlock runat="server" ID="RadCodeBlock1">         
<script type="text/javascript">             
//<![CDATA[             
var listBox;             
function pageLoad() {                 
listBox = $find("<%= ctl00$MainContent$SortUC$RadListBox1.ClientID %>");           
}

etc...etc

However when I run the code, I'm getting this error:
error CS1056: Unexpected character '$'

and its pointing to the line with the form name. I can find scant little info on the internet about this, so can somone
please tell me how this is supposed to work if it can't handle any non-alphanumerical chars in the string?

Thanks,
Alan R