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  1. #1
    New to the CF scene
    Join Date
    Dec 2011
    Thanked 0 Times in 0 Posts

    need help with Microsoft JScript runtime error: '$' is undefined

    I get "Microsoft JScript runtime error: '$' is undefined" with the javascript below. How should I troubleshoot this?

    <script type="text/javascript" language="javascript">
    function ShowPopup() {
    $('#<%=pnlpopup.ClientID %>').show();
    function HidePopup() {
    $('#<%=pnlpopup.ClientID %>').hide();
    $(".btnClose").live('click', function () {

  • #2
    Supreme Master coder! Old Pedant's Avatar
    Join Date
    Feb 2009
    Thanked 4,741 Times in 4,703 Posts
    That means you haven't loaded the jQuery library.

    You should have a line that looks like
    <script src="...some...url...that...ends...with....jquery.js"></script>
    in your page.

    $ is simply a variable name (yes, JS variables can use $ and can start with $) that jQuery [and a few other libraries, but the odds or 50 to 1 it's jQuery] uses as its universal "find anything anwhere" function name.

    For example, $("#mask") means essentially the same thing as document.getElementById("mask")
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