function ajaxObject(url, callbackFunction) {
  var that=this;
  this.updating = false;
  var objContenedor = null;

  this.SetContenedor = function(varContenedor){
		objContenedor = varContenedor;	  
  } 

  this.update = function(passData,postMethod) {
    if (that.updating==true) { return false; }
    that.updating=true;
    var AJAX = null;
    if (window.XMLHttpRequest) {
      AJAX=new XMLHttpRequest();
    } else {
      AJAX=new ActiveXObject("Microsoft.XMLHTTP");
    }
    if (AJAX==null) {
      return false;
    } else {
      AJAX.onreadystatechange = function() {
        if (AJAX.readyState==4) {
          that.updating=false;
		  if (objContenedor==null){
	          that.callback(AJAX.responseText,AJAX.status,AJAX.responseXML);
		  }else{
			  objContenedor.innerHTML = AJAX.responseText;
		  }
          delete AJAX;
        }
      }
      var timestamp = new Date();
      if (postMethod=='POST') {
        var uri=urlCall+'?'+timestamp.getTime();
        AJAX.open("POST", uri, true);
        AJAX.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        AJAX.send(passData);
      } else {
        var uri=urlCall+'?'+passData+'&timestamp='+(timestamp*1);
        AJAX.open("GET", uri, true);
        AJAX.send(null);
      }
      return true;
    }
  }
  var urlCall = url;
  this.callback = callbackFunction || function () { };
}//end function ajaxObject



function $AjaxCallContenedor(url, funcion, contenedor){
	var objAjax = new ajaxObject(url, funcion);
	if (contenedor!=null){
		if (contenedor!=''){
			objAjax.SetContenedor(contenedor);
		}//end if
	}//end if
	objAjax.update();
}//end AjaxCallContenedor