Why a:hover didn't on jquery
<p>why a:hover didn't on jquery</p>

<pre><code>$(document).ready(function(){

$("#leftmenu ul li.active ul li a").css( "background-color","#4a4647" );  &lt;--it work
$("#leftmenu ul li.active ul li a:hover").css( "background-color","#d3d4d6" );  &lt;--didn't work

});
</code></pre>
