Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler);
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);

    var elem = null;
    var value = "";
    var width = "";
    var height = "";
    var borderWidth = "";
    var backgroundcolor = "";
    function BeginRequestHandler(sender, args) {
        elem = args.get_postBackElement();
        value = elem.value;
//        width = document.getElementById(elem.id).style.width;
//        height = document.getElementById(elem.id).style.height;
//        borderWidth = document.getElementById(elem.id).style.borderWidth;
//        backgroundcolor = document.getElementById(elem.id).style.backgroundColor;
//        document.getElementById(elem.id).value = "";
//        document.getElementById(elem.id).style.backgroundImage = "url(Images/loading5.gif)";
//        document.getElementById(elem.id).disabled = true;
//        document.getElementById(elem.id).style.borderWidth = 0;

//        document.getElementById(elem.id).style.backgroundColor = "Transparent";
//        document.getElementById(elem.id).style.backgroundRepeat = "no-repeat";
//        $('#' + elem.id).hide("fast");
        if ($('#' + elem.id).is("input")) {
            $('#' + elem.id).attr("disabled", true);
        }
        else {
            $('#' + elem.id).hide("fast");
        }
        $('#' + elem.id).parent().html("<img alt='loading' src='interface/images/loading5.gif' /> &nbsp;&nbsp;&nbsp;  در حال بارگذاری...");

    }
    function EndRequestHandler(sender, args) {
//        document.getElementById(elem.id).disabled = false;
//        document.getElementById(elem.id).value = value;
//        document.getElementById(elem.id).style.backgroundImage = "";
//        document.getElementById(elem.id).style.borderWidth = borderWidth;
//        document.getElementById(elem.id).style.width = width;
//        document.getElementById(elem.id).style.height = height;
//        document.getElementById(elem.id).style.backgroundColor = backgroundcolor;
        $('html,body').animate({ scrollTop: 0 }, 500);
        if ($('#' + elem.id).is("input")) {
            $('#' + elem.id).attr("disabled", false);
        }
        else {
            $('#' + elem.id).hide();
            $('#' + elem.id).fadeIn();


        }
    }