案例：HTML DOM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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​
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<script type="text/javascript">
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message="最好的学习方法，是学习实例。-www.W3xue.com"
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pos=0
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maxlength=message.length+1
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​
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function writemsg()
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{
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if (pos<maxlength)
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    {
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    txt=message.substring(pos,0)
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    document.forms[0].msgfield.value=txt
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    pos++
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    timer=setTimeout("writemsg()", 50)
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    }
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}
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function stoptimer()
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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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​
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<body onload="writemsg()" onunload="stoptimer()">
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<form>
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<input id="msgfield" size="65">
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</form>
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</body>
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</html>
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​