java script open new page

function customOpen(url) {
            var w = window.open(url, '', 'width=1000,height=600,toolbar=0,status=0,location=0,menubar=0,directories=0,resizable=1,scrollbars=1');
            w.focus();

        }


 String url = "Sun_GL_Transection.aspx?key=" + xEmpId + "&Sid=" + Xservceid + "&Did=" + Xwebservice_dtl_id;
            ScriptManager.RegisterClientScriptBlock(this, GetType(), "newpage", "customOpen('" + url + "');", true);