function setScrollBar() {
    var x, y;
    var prm = Sys.WebForms.PageRequestManager.getInstance();

    function BeginRequestHandler(sender, args)
    {
        x = $get('ctl00_ContentPlaceHolder1_thumbnails').scrollLeft;
    }

    function EndRequestHandler(sender, args)
    {
        $get('ctl00_ContentPlaceHolder1_thumbnails').scrollLeft = x;
    }


    prm.add_beginRequest(BeginRequestHandler);
    prm.add_endRequest(EndRequestHandler);
}

// YAHOO.util.Event.onDOMReady(setScrollBar);