[Jolten]

The script I use....

<script language="JavaScript">
<!-- 
function goToURL(form)
  {

    var myindex=form.dropdownmenu.selectedIndex
    if(!myindex=="")
      {
        //window.location.href=form.dropdownmenu.options[myindex].value;

        //This is an alternative method you can use
        var Target = "_blank";
        window.open(form.dropdownmenu.options[myindex].value,Target,"");
      }
}
//-->
</script>

I've got the top string commented out because I wanted new windows when selected. You can uncomment it and comment out the alternative method to open links in the same window.

and the form...

<form name="dropDownForm">
	<select name="dropdownmenu" size="1" onChange="goToURL(this.form)">
		<option value="url">Text</option>
		<option value="url">Text</option>
 	</select>
</form>

This works perfectly with every browser as far as I know.