var URL = new Array();
 URL[0] = "http://www.example1.com";
 URL[1] = "http://www.example2.com";
 URL[2] = "http://www.example3.com";
var nRequest = new Array();
for (var i=0; i<3; i++){
nRequest[i] = new XMLHttpRequest();
nRequest[i].open("GET", URL[i], true);
nRequest[i].onreadystatechange = function (oEvent) {
if (nRequest[i].readyState === 4) {
if (nRequest[i].status === 200) {
  console.log(nRequest[i].responseText);
  alert(nRequest[i].responseText);
} else {
  console.log("Error", nRequest[i].statusText);
}
  }
};
nRequest[i].send(null);
}
	
wRequest = new XMLHttpRequest();
wRequest.open("GET", "http://www.example1.com", true);
wRequest.onreadystatechange = function (oEvent) {
if (wRequest.readyState === 4) {
if (wRequest.status === 200) {
  console.log(wRequest.responseText);
  alert(wRequest.responseText);
} else {
  console.log("Error", wRequest.statusText);
}
  }
};
wRequest.send(null);
}
	
for (var i=0; i<3; i++){
   (function(i) {
      nRequest[i] = new XMLHttpRequest();
      nRequest[i].open("GET", URL[i], true);
      nRequest[i].onreadystatechange = function (oEvent) {
         if (nRequest[i].readyState === 4) {
            if (nRequest[i].status === 200) {
              console.log(nRequest[i].responseText);
              alert(nRequest[i].responseText);
            } else {
              console.log("Error", nRequest[i].statusText);
            }
         }
      };
      nRequest[i].send(null);
   })(i);
}