//Update the Image Hover after the UpdatePanel refreshes.
function pageLoad(sender, arg) {
    if (arg.get_isPartialLoad()) {
        setImageHover();
    };
}

//Handles Loading Panel 
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_initializeRequest(initializeRequest);

function initializeRequest(sender, e) {
    if (prm.get_isInAsyncPostBack()) {
        e.set_cancel(true);
    }
    $('DIV.SkuList DIV.ProgressWindow').show();
}