<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>
多个属性条件, 如(有 id 且 name 开始是 "D"): $("body [id][name^='D']")
<span id="span1" name="S1">AAA</span><br/>
<span id="span2" name="S2">BBB</span><br/>
<span name="Sx3">CCC</span><br/>
<span name="Sx4">DDD</span><br/>
<div id="div1" name="Dx1">EEE</div>
<div name="D2">FFF</div>
查找包含 "AB" 的 span: $("span:contains('AB')")
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
</div>
从 div 中查找包含 "AB" 的 span: $("div span:contains('AB')")
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
</div>
查找包含 的 span: $("span:has('b')")
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
</div>
查找空的 span: $("span:empty")
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
</div>
查找非空的(也就是作为父元素的) span: $("span:parent")
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
<div>
<span>ABC</span><br/>
<span><b>ABC</b></span><br/>
<span></span>
</div>
:hidden 与 :visible 分别对应隐藏与显示的元素; 下例让已显示的变红, 让隐藏的显示为灰色.
<!doctype html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.4.2.min.js"></script>
</head>
<body>
<div>111</div>
<div>222</div>
<div style="display:none">333</div>
<div style="display:none">444</div>
