[Schokk]

нашел решение.

<script type="text/javascript">
function _go() {
    //alert(document.getElementById('address').options[document.getElementById('address').selectedIndex].value);
    location.href=document.getElementById('adress').options[document.getElementById('adress').selectedIndex].value;
}
var adres1=window.location.pathname.toString();
var res=adres1.indexOf('full') + 1;
if(!res){
document.write("<select name='countries' onchange='_go()' id='adress' class='countries'>");
document.write("<option value='0'>Все страны </option>");
document.write("{start}<option {selected} value='/activity/{categ}/1/{id}-{translit}/{sortBy}'>{name} ({count})</option>{end}</select>");
}
</script>