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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<body>
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​
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<form id="myForm">
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Firstname: <input id="fname" type="text" value="Mickey" />
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Lastname: <input id="lname" type="text" value="Mouse" />
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<input id="sub" type="button" value="Submit" />
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</form>
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​
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<p>Get the value of all the elements in the form:<br />
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<script type="text/javascript">
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var x=document.getElementById("myForm");
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for (var i=0;i<x.length;i++)
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  {
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  document.write(x.elements[i].value);
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  document.write("<br />");
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  document.write(x.elements[i].type);
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  document.write("<br />");
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  }
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</script>
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</p>
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​
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</body>
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</html>
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​