html运行实例（xmle_xmlhttprequest

代码示例：（标识：xmle_xmlhttprequest_js）
<html>
<head>
<script type="text/javascript">
var xmlhttp

function loadXMLDoc(url)
{
xmlhttp=null
// code for Mozilla, etc.
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest()
  }
// code for IE
else if (window.ActiveXObject)
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
  }
if (xmlhttp!=null)
  {
  xmlhttp.onreadystatechange=state_Change
  xmlhttp.open("GET",url,true)
  xmlhttp.send(null)
  }
else
  {
  alert("Your browser does not support XMLHTTP.")
  }
}

function state_Change()
{
// if xmlhttp shows "loaded"
if (xmlhttp.readyState==4)
  {
  // if "OK"
  if (xmlhttp.status==200)
  {
  alert("XML data OK")
  document.getElementById('A1').innerHTML=xmlhttp.status
  document.getElementById('A2').innerHTML=xmlhttp.statusText
  document.getElementById('A3').innerHTML=xmlhttp.responseText
  }
  else
  {
  alert("Problem retrieving XML data:" + xmlhttp.statusText)
  }
  }
}

</script>
</head>

<body onload="loadXMLDoc('/static/demo/xml/note.xml')">
<h2>Using the HttpRequest Object</h2>

<p><b>status:</b>
<span id="A1"></span>
</p>

<p><b>status text:</b>
<span id="A2"></span>
</p>

<p><b>response:</b>
<br /><span id="A3"></span>
</p>

</body>
</html>