U.Helper

<script>  
function thismod(mod) {  
document.poisk.action='/'+mod+'/';  
switch (mod) {  
case 'blog':  
aa=13;  
break;  
case 'news':  
aa=14;  
break;  
default:  
aa=2;  
}  
document.poisk.a.value=aa;  
}  
</script>  
<form name="poisk" method="post" style="margin:0px" action="/news/">  
<input type="text" name="query" maxlength="30" size="20" /><br>
<select size="1" name="modul" onChange="thismod(this.value)">  
<option value="news" selected>Новости</option>
<option value="load">Файлы</option>
<option value="publ">...</option>
</select><br>  
<input type="submit" value="Поиск" />  
<input type="hidden" name="a" value="14" />  
</form>

<form name="searchform" method="post" style="margin:0px" action="/$MODULE_ID$/">