案例：JavaScript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">
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function mouseOver()
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{
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document.b1.src ="/img/eg_mouse.jpg"
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}
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function mouseOut()
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{
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document.b1.src ="/img/eg_mouse2.jpg"
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}
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</script>
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</head>
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​
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<body>
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<a href="/" target="_blank">
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<img border="0" alt="Visit W3xue!" src="/img/eg_mouse2.jpg" name="b1"  onmouseover="mouseOver()" onmouseout="mouseOut()" /></a>
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</body>
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</html>