U.Helper

<form name="idForm">
<input type="text" name="id" value="">
<input onClick="searchLOL();return false" value="найты" type="submit">
</form>

<script type="text/javascript">
function searchLOL(){
var ida=document.idForm.id.value;
window.location.href='/search/' + ida;
}
</script>

<input type="text" id="search"> <input type="button" value="Искать" onclick="var _s = document.getElementById('search').value; if (_s) location.href='/search/'+_s;">