Hover Event in Jquery does Nothing : <p>I have this javascript code that highlight's a navigation tab when it's hovered over, but whenever I hover with my mouse it does nothin. What should I do?</p>

<pre><code>$("nav ul li").hover(
    function(){
        $("nav ul li").css("background-color","rgba(255,255,255,0.9)");
    },
    function(){
        $("nav ul li").css("background-color","");
    }
);
</code></pre>
