ajax案例 - W3xue在线HTML/CSS/JS运行工具

<html>
<head>
<script type="text/javascript">
function loadXMLDoc(url)
{
var xmlhttp;
var txt,x,xx,i;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    txt="<table border='1'><tr><th>Title</th><th>Artist</th></tr>";
    x=xmlhttp.responseXML.documentElement.getElementsByTagName("CD");
    for (i=0;i<x.length;i++)
      {
      txt=txt + "<tr>";
      xx=x[i].getElementsByTagName("TITLE");
        {
        try
          {
          txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
          }
        catch (er)
          {
          txt=txt + "<td> </td>";
          }
        }
      xx=x[i].getElementsByTagName("ARTIST");
        {
        try
          {
          txt=txt + "<td>" + xx[0].firstChild.nodeValue + "</td>";
          }
        catch (er)
          {
          txt=txt + "<td> </td>";
          }
        }
      txt=txt + "</tr>";
      }
    txt=txt + "</table>";
    document.getElementById('txtCDInfo').innerHTML=txt;
    }
  }
xmlhttp.open("GET",url,true);
xmlhttp.send();
}
</script>
</head>
<body>

</body>
</html>

AخA
<button onclick="loadXMLDoc('/example/xmle/cd_catalog.xml')">获得 CD 信息</button>
 
<html>
<head>
<script type="text/javascript">
function loadXMLDoc(url)
{
var xmlhttp;
var txt,x,xx,i;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    txt="<table border='1'><tr><th>Title</th><th>Artist</th></tr>";
    x=xmlhttp.responseXML.documentElement.getElementsByTagName("CD");
    for (i=0;i<x.length;i++)
      {
      txt=txt + "<tr>";