案例：HTML DOM案例     状态：可编辑再运行    进入竖版
 运行结果　
​x
 
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<html>
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<head>
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​
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<script type="text/javascript">
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var i=0
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txt=new Array("trailA","trailB","trailC")
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​
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function cursor(interval)
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{
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pos=i*8+5
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if (interval=='first')
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    {
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    i=0
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    }
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if (i==0)
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    {
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    xpos=event.clientX
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    ypos=event.clientY
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    document.all(txt[i]).style.visibility="visible"
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    document.all(txt[i]).style.position="absolute"
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    document.all(txt[i]).style.left=xpos+5
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    document.all(txt[i]).style.top=ypos+5
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    }
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else
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    {
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    document.all(txt[i]).style.visibility="visible"
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    document.all(txt[i]).style.position="absolute"
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    document.all(txt[i]).style.left=xpos+pos
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    document.all(txt[i]).style.top=ypos+pos
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    }
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if (i==txt.length)
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    {
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    i=i
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    }
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else
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    {
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    i++
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    }
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setTimeout("cursor('next')",10)
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}
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</script>
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​
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</head>
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<body onmousemove="cursor('first')">
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​
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<h1>请在页面上移动指针</h1>
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​
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<span id="trailA" style="visibility:hidden">W</span>