Do sekce <BODY> umístěte:

 <SCRIPT language=JavaScript>
<!--
function go(form)
{
x=form.menu.selectedIndex;
adresa="http://"+form.menu[x].value;
if (x>0) window.open(adresa,"_blank");
}
// -->
</SCRIPT>

<FORM><SELECT name=menu onchange=go(form)> <OPTION selected>MENU
--&gt;</OPTION> <OPTION value=google.com>Google</OPTION> <OPTION
value=hotbot.com>Hotbot</OPTION> <OPTION
value=yahoo.com>Yahoo</OPTION></SELECT>