多种元素选择器 jQuery("selector1,selector2,selectorN")
例子：
<!doctype html>
<html lang='zh'>
<head>
<meta charset='utf-8'>
<title>multiple demo</title>
<style type="text/css">
</style>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<div>div</div>
<p class='myClass'>p class='myClass'</p>
<p class='notMyClass'>p class='notMyClass'</p>
<span>span</span>
<script>
$("div,span,p.myClass").css("border","3px solid red");
</script>
</body>
</html>
例：
<!doctype html>
<html lang='zh'>
<head>
<meta charset='utf-8'>
<title>multiple demo</title>
<style type="text/css">
b{
color:red;
font-size: 16px;
display: block;
clear: left;
}
div,span,p{
width: 40px;
height: 40px;
float: left;
margin: 10px;
background-color: blue;
padding: 3px;
color:white;
}
</style>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<span>span</span>
<p>p</p>
<p>p</p>
<div>div</div>
<span>span</span>
<p>p</p>
<div>div</div>
<b></b>
<script type="text/javascript">
var list = $("div,p,span").map(function(){
return this.tagName;
}).get().join(", ");
$("b").append(document.createTextNode(list));
</script>
</body>
</html>
