function createXMLHttpRequest() {

var ua;

if(window.XMLHttpRequest) {
    try {
      ua = new XMLHttpRequest();
    } catch(e) {
      ua = false;
    }
  } else if(window.ActiveXObject) {
    try {
      ua = new ActiveXObject("Microsoft.XMLHTTP");
    } catch(e) {
      ua = false;
    }
  }
  return ua;
}

var req = createXMLHttpRequest();

function sendRequest(id, url) {
	
  req.open('get', url+id);
  req.onreadystatechange = handleResponse;
  req.send(null);
}

function handleResponse() {
  if(req.readyState == 4){
    document.getElementById('leadDetail').innerHTML = req.responseText;
  }
}