hasClass(class) returns true if the specified class is present
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("p:last").addClass("selected highlight");
alert($("p:last").hasClass("selected").toString());
});
</script>
<style>
.selected { color:red; }
.highlight { background:yellow; }
</style>
</head>
<body>
<body>
<p>A</p>
<p>B</p>
<p>C</p>
</body>
</html>
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