<script language="javascript">
function jm(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}
</script>
<SELECT onchange="jm('self',this,0);">
 <option value="http://www.google.com.tr">Google Türkiye</option>
 <option value="http://www.r10.net">R10.net</option>
</select> 

<SCRIPT LANGUAGE="javascript">
function LinkUp() 
{
var number = document.DropDown.DDlinks.selectedIndex;
location.href = document.DropDown.DDlinks.options[number].value;
}
</SCRIPT>
<FORM NAME="DropDown">
<SELECT NAME="DDlinks" onChange="LinkUp(this.form)">
<OPTION SELECTED>--> Site Seçin <--
<OPTION VALUE="http://www.cennetturkiye.org">Site 1
<OPTION VALUE="http://www.cennetturkiye.org">Site 2
</SELECT>
</FORM>