/****************************Start Ajax***********************************/
  function sendRequest(url,callback,postData) {
  	var req = createXMLHTTPObject();
  	if (!req) return;
  	var method = (postData) ? "POST" : "GET";
  	req.open(method,url,true);
  	req.setRequestHeader('User-Agent','XMLHTTP/1.0');
  	if (postData)	req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
  	req.onreadystatechange = function () {
      if (req.readyState != 4){setWaiting(); return;}
  		if (req.status != 200 && req.status != 304) {
  //			alert('HTTP error ' + req.status);
  			return;
  		}
  		callback(req);
  	}
  	if (req.readyState == 4) return;
  	req.send(postData);
  }

  function XMLHttpFactories() {
  	return [
  		function () {return new XMLHttpRequest()},
  		function () {return new ActiveXObject("Msxml2.XMLHTTP")},
  		function () {return new ActiveXObject("Msxml3.XMLHTTP")},
  		function () {return new ActiveXObject("Microsoft.XMLHTTP")}
  	];
  }
  
  function createXMLHTTPObject() {
  	var xmlhttp = false;
  	var factories = XMLHttpFactories();
  	for (var i=0;i<factories.length;i++) {
  		try {
  			xmlhttp = factories[i]();
  		}
  		catch (e) {
  			continue;
  		}
      break;
    }
  	return xmlhttp;
  }
  
/********************************End Ajax********************************/
function setWaiting(){
  //put as waiting
  document.getElementById('content').innerHTML = "<img src='/images/ajax-loader.gif'>";
}