microsoft jscript runtime error object expected

Please help me for resolving the jquery error.

$('#<%=drpMasters.ClientID%>').change(function () {
        $('#divLeadSource').css("display", "none");
        $('#divAccount').css("display", "none");
        $('#divContact').css("display", "none");
        $('#divLeadStatus').css("display", "none");
        $('#divSupplier').css("display", "none");

        var element = $(this).find('option').filter(':selected').val();

        switch (element) {
            case "1":
                $('#divLeadSource').css("display", "block");
                $('#<%=lblQuickHead.ClientID%>').val("New Lead Source");
                break;
            case "2":
                $('#divAccount').css("display", "block");
       开发者_Go百科         $('#<%=lblQuickHead.ClientID%>').val("New Account");
                break;
            case "3":
                $('#divContact').css("display", "block");
                $('#<%=lblQuickHead.ClientID%>').val("New Contact");
                break;
            case "4":
                $('#divLeadStatus').css("display", "block");
                $('#<%=lblQuickHead.ClientID%>').val("New Lead Status");
                break;
            case "5":
                $('#divSupplier').css("display", "block");
                $('#<%=lblQuickHead.ClientID%>').val("New Supplier");
                break;
            default:

        }

    });

The "object expected" error usually means that you have a stray comma somewhere but I don't see how that could be your problem here. The only possibility I can see in your code is this:

switch (element)

If this chain

$(this).find('option').filter(':selected')

doesn't find anything then you'll end up with element having an undefined value and IE may be upset that you are trying to switch on an undefined value.

This is my best guess without a functional example.