1 function Ajax(url) { 2  //url请求地址 3  var m_xmlReq = null; 4  if (window.ActiveXObject) { 5   try { 6    m_xmlReq = new ActiveXObject('Msxml2.XMLHTTP'); 7   } 8   catch (e) { 9    try {10     m_xmlReq = new ActiveXObject('Microsoft.XMLHTTP');11    }12    catch (e) {13 14    }15   }16  }17  else if (window.XMLHttpRequest) {18   m_xmlReq = new XMLHttpRequest();19  }20  this.post = function(data) {21   if (!m_xmlReq)22    return;23   m_xmlReq.open('POST', url, false);24   m_xmlReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=gb2312');25   m_xmlReq.send(data);26   return m_xmlReq.responseText;27  }28 }