案例：HTML DOM案例     状态：可编辑再运行    进入横版
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<html>
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<head>
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<script>
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function startEQ()
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{
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richter=5
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parent.moveBy(0,richter)
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parent.moveBy(0,-richter)
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parent.moveBy(richter,0)
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parent.moveBy(-richter,0)
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timer=setTimeout("startEQ()",10)
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}
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function stopEQ()
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{
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clearTimeout(timer)
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}
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</script>
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</head>
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<body>
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​
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<form>
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<input type="button" onclick="startEQ()" value="开始地震">
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<br />
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<br />

 运行结果　
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