Export to PDF with Telerik javascript

 function exportElement() {

    var exp = $find("<%= RadClientExportManager1.ClientID %>");

    var divtoPrint = $telerik.$("#divtoPrint");

    var originalWidth = divtoPrint.width();

    divtoPrint.width("1000px")

    // https://www.telerik.com/support/kb/aspnet-ajax/gauge/details/radgauge-with-display-none-does-not-render-properly

    $telerik.$("#divtoPrint").find(".RadHtmlChart").each(function (index, elem) {

        if (elem && elem.control && elem.control.repaint) {

            elem.control.repaint();

        }

    });

  

    exp.exportPDF($telerik.$("#divtoPrint"));

}