This is the code of my select, and nothig happens:
<div class="orderby-order-container">
<ul class="orderby order-dropdown">
<li>
<span class="current-li">
<span class="current-li-content">
<a>Ordina per <strong>Ordine predefinito</strong></a>
</span>
</span>
<ul>
<li class="current">
<a href="?product_orderby=default">Ordina per <strong>Ordine predefinito</strong></a>
</ul>
</li>
<li class="">
<a href="?product_orderby=name">Ordina per <strong>Nome</strong></a>
<li class="">
<a href="?product_orderby=price">Ordina per <strong>Prezzo</strong></a>
<li class="">
<a href="?product_orderby=date">Ordina per <strong>Data</strong></a>
<li class="">
<a href="?product_orderby=popularity">Ordina per <strong>Popolarità </strong></a>
<li class="">
<a href="?product_orderby=rating">Ordina per <strong>Valutazione</strong></a>