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 alertId()
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  {
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  var txt="Id: " + document.getElementById("myButton").id
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  txt=txt + ", type: " + document.getElementById("myButton").type
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  txt=txt + ", value: " + document.getElementById("myButton").value
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  alert(txt)
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  document.getElementById("myButton").disabled=true
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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" value="Click me!" id="myButton" onclick="alertId()" />
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</form>
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​
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</body>
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</html>
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​