How to work with print option in javascript

<script type="text/javascript">
    function PrintGridData() {
        var prtGrid = document.getElementById('<%=searchedgrid.ClientID %>');
        var prtMenu = document.getElementById("<%=lblCurrentPath.ClientID %>").innerHTML;
        var prtwin = window.open('', 'PrintGridView', 'left=100,top=100,width=400,height=400,tollbar=0,scrollbars=1,status=0,resizable=1');
        if (prtMenu != null) {
            prtwin.document.write(prtMenu.outerHTML);
        }
        if (prtGrid != null) {
            prtwin.document.write(prtGrid.outerHTML);
        }
        prtwin.document.close();
        prtwin.focus();
        prtwin.print();
        prtwin.close();
    }
   </script>