function PopUpWindow(request_uri, top, left, width, height) {
        var param = 'toolbar=no,scrollbars=no,menubar=no,directories=no,status=no,width='+width+',height='+height+'left='+left+', top='+top+',screenX='+left+',screenY='+top;
        window.open(request_uri,'',param);
        return false;
}