<script language="JavaScript">
<!--
function test1(targ,selObj,restore){ //v3.0
window.open (selObj.options[selObj.selectedIndex].value,targ)
if (restore) selObj.selectedIndex=0;
}
//-->
</script>
<select name="menu1" onChange="test1('parent',this,'resizable')">
<option>test</option>
<option value='http://www.sohu.com'>sohu</option>
<option value='http://www.sina.com'>sina</option>
</select>