document.write('<form name="myurl"><select name="select" size="1" onchange="location=this.options[this.selectedIndex].value"><option value=#>论坛导航菜单</option><option value=main.php?layer_1=&qs=>╋ <b></b></option><option value=main.php?layer_1=&layer_2=&qs=>&nbsp;┠ </option></select></form>');