案例:jquery案例     状态:可编辑再运行    进入竖版
 运行结果 
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<html>
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<head>
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<script type="text/javascript" src="/js/jquery.js"></script>
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<script type="text/javascript">
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$(document).ready(function(){
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$("button").click(function(){
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$("p").hide();
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});
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});
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</script>
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</head>
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<body>
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<h2>This is a heading</h2>
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<p>This is a paragraph.</p>
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<p>This is another paragraph.</p>
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<button type="button">Click me</button>
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</body>
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</html> 
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