案例：ajax案例     状态：可编辑再运行    进入竖版
 运行结果　
AخA
<button onclick="loadXMLDoc('/example/xmle/cd_catalog.xml')">获得 CD 信息</button>
 
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<html>
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<head>
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<script type="text/javascript">
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function loadXMLDoc(url)
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{
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var xmlhttp;
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var txt,x,xx,i;
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if (window.XMLHttpRequest)
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  {// code for IE7+, Firefox, Chrome, Opera, Safari
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  xmlhttp=new XMLHttpRequest();
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  }
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else
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  {// code for IE6, IE5
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  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
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  }
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xmlhttp.onreadystatechange=function()
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  {
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  if (xmlhttp.readyState==4 && xmlhttp.status==200)
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    {
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    txt="<table border='1'><tr><th>Title</th><th>Artist</th></tr>";
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    x=xmlhttp.responseXML.documentElement.getElementsByTagName("CD");
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    for (i=0;i<x.length;i++)
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      {
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      txt=txt + "<tr>";
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      xx=x[i].getElementsByTagName("TITLE");
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        {
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        try
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          {
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          txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
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          }
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        catch (er)
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          {
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          txt=txt + "<td> </td>";
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          }
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        }
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      xx=x[i].getElementsByTagName("ARTIST");
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        {
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        try
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          {
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          txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
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          }
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        catch (er)
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          {
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          txt=txt + "<td> </td>";
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          }
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        }
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      txt=txt + "</tr>";
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      }