Qualcuno mi dice, per piacere, che cosa manca a questo script per funzionare?
grazie!


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Documento senza titolo</title>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".block").toggle(function() {
$(this).animate({backgroundColor: "#000000"}, 1000);
},

function() {
$(this).animate({backgroundColor: "#68BFEF"}, 500);

});

});
</script>
<style>
.block {
color: white;
background-color: #68BFEF;
width: 150px;
height: 70px;
margin: 10px;
}

</style>

</head>
<body>

<div class="block"> Clicca qui!</div>
</body>
</html>