XmlHttp学习范例

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<script language="javascript" type="text/javascript">
function XmlHttpTest()
{
 var xmlHttpReq = new ActiveXObject("MSXML2.XMLHTTP.3.0");
 xmlHttpReq.open("GET", "http://localhost/XmlControlDemo/users_2.xml", false);
 xmlHttpReq.send();
 alert(xmlHttpReq.responseText);
}

var XmlHttp;
XmlHttp = new ActiveXObject("Msxml2.XMLHTTP.3.0");
function send()
{
 XmlHttp.onreadystatechange = doHttpReadyStateChange;
 XmlHttp.open("GET", "http://localhost/XmlControlDemo/users_2.xml", true);
 XmlHttp.send();
}
function doHttpReadyStateChange()
{
 if (XmlHttp.readyState == 4)
 {
  alert("Done");
 }
}
</script>
<body>
<input type="button" name="button" value="测试Xml" οnclick="XmlHttpTest();" />
<input type="button" id="btnStateTest" value="测试State" οnclick="send();" />
</body>
</html>
 XML数据为:<users>
  <xs:schema id="users" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="users" msdata:IsDataSet="true" msdata:Locale="zh-CN">
      <xs:complexType>
        <xs:choice maxOccurs="unbounded">
          <xs:element name="user">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="userName" type="xs:string" minOccurs="0" msdata:Ordinal="0" />
                <xs:element name="userPass" type="xs:string" minOccurs="0" msdata:Ordinal="1" />
              </xs:sequence>
              <xs:attribute name="id" type="xs:string" />
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <user id="1">
    <userName>outrace</userName>
    <userPass>mypass</userPass>
  </user>
  <user id="2">
    <userName>trace</userName>
    <userPass>mypass</userPass>
  </user>
  <user id="3">
    <userName>new user</userName>
    <userPass>new passwd</userPass>
  </user>
</users>

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