function showCustomer()
{ 
var xmlHttp=getxmlhttp();
var url=""
url="111.txt";
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("post",url,true);
xmlHttp.send(null);
}


function getxmlhttp(){
	xmlHttp=null;
      if(window.XMLHttpRequest){
          xmlHttp = new XMLHttpRequest();
      } else if(window.ActiveXObject){
          xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
      } else {
          return;
      }
      return xmlHttp;
}

function stateChanged()
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
xmlHttp.close;
}
}

setInterval('showCustomer()', 1000);