Пример:
Поиск класса 'selected' в выбранных элементах.
"jQuery"
$("div#result1").append($("p:first").hasClass("selected").toString()); $("div#result2").append($("p:last").hasClass("selected").toString()); $("div#result3").append($("p").hasClass("selected").toString());
"HTML"
Hello
<p class="selected">Goodbye</p> <div id="result1">First paragraph has selected class: </div> <div id="result2">Last paragraph has selected class: </div> <div id="result3">Some paragraph has selected class: </div>
"CSS"
p { margin: 8px; font-size:16px; }
.selected { color:red; }
.highlight { background:yellow; }
"Живой пример jQuery"
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link href="http://slyweb.ru/css/jqueryiframe.css"
rel="stylesheet" type="text/css"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("div#result1").append($("p:first").hasClass("selected").toString());
$("div#result2").append($("p:last").hasClass("selected").toString());
$("div#result3").append($("p").hasClass("selected").toString());
});
</script>
</head>
<body class="iframe">
Hello
<p class="selected">Goodbye</p>
<div id="result1">First paragraph has selected class: </div>
<div id="result2">Last paragraph has selected class: </div>
<div id="result3">Some paragraph has selected class: </div>
</body>
</html>
<style>
p { margin: 8px; font-size:16px; }
.selected { color:red; }
.highlight { background:yellow; }
</style>