var xmlHttp;

function createXMLHttpRequest(){
if (window.XMLHttpRequest) { 
  xmlHttp = new XMLHttpRequest();
  if (xmlHttp.overrideMimeType) {
   xmlHttp.overrideMimeType('text/xml');
  }
 } 
 else if (window.ActiveXObject) {
  try {
   xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); 
   xmlHttp.setrequestheader("content-type","application/x-www-form-urlencoded; charset=UTF-8");
  } catch (e) {
   try {
    xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); //内容

   } catch (e) {}
  }
}
}

function startRequest(url){
 createXMLHttpRequest();
 try{
  xmlHttp.onreadystatechange = handleStateChange;
  xmlHttp.open("GET", url, false);
  xmlHttp.send(null);   
   //alert(xmlHttp.responseText);
 }
 catch(exception)
 {
  alert("Not exists,sorry!");
 }
}

function handleStateChange(){ 
 if(xmlHttp.readyState == 4){  
  if (xmlHttp.status == 200 || xmlHttp.status == 0)
  {
   
   document.all.content1.innerHTML=xmlHttp.responseText;
  }
 }
}