jQuery each中的this
使用
$.each(function(){
alert(this.nodeName);
alert($(this));
});
要注意二者的不同this是一个dom对象，要使用jQuery的方法必须用jQuery(this)包含，负责只能用dom对象的方法，看下面的例子
<html>
<head>
<title>nth-child-test</title>
<script src="jquery-1.6.1.min.js"></script>
<script type="text/JavaScript">
$(function(){
$("tr").each(function(){
$(this.nodeName+":nth-child(2)").attr("style","color:red;");
});
});
</script>
</head>
<body>
<table>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>2</td>
<td>2</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td>3</td>
<td>3</td>
</tr>
</table>
</body>
</html><html>
<head>
<title>jQuery nth-child example</title>
<script type="text/javascript" src="jquery-1.6.1.min.js"></script>
</head>
<body>
<h1>jQuery nth-child example</h1>
<table border=1>
<tr><td>Row #1</td></tr>
<tr><td>Row #2</td></tr>
<tr><td>Row #3</td></tr>
<tr><td>Row #4</td></tr>
<tr><td>Row #5</td></tr>
<tr><td>Row #6</td></tr>
<tr><td>Row #7</td></tr>
<tr><td>Row #8</td></tr>
<tr><td>Row #9</td></tr>
<tr><td>Row #10</td></tr>
</table>
<br/>
<button>:nth-child(4)</button>
<button>:nth-child(3n)</button>
<button>:nth-child(even)</button>
<button>:nth-child(odd)</button>
<script type="text/javascript">
$("button").click(function () {
var str = $(this).text();
$("tr").css("background", "white");
$("tr" + str).css("background", "coral");
});
</script>
</body>
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