function gourl(vv) {
        var vvalue = vv.options[vv.selectedIndex].value;
        var vindex = vv.selectedIndex;
        if (vv.options[vv.selectedIndex].value != '') {
            window.open(vv.options[vv.selectedIndex].value, 'xx');
            vv.options[vv.selectedIndex].value = "";
            vv.selectedIndex = 0;
            vv.options[vindex - 0].value = vvalue;
        }
    }