function addEvent(obj, eventName, func){

    if (obj.attachEvent)

    {

    obj.attachEvent("on" + eventName, func);

    }

    else if(obj.addEventListener)

    {

    obj.addEventListener(eventName, func, true);

    }

    else

    {

    obj["on" + eventName] = func;

    }

    }

    addEvent(window, "load", function(e){

        addEvent(document.body, "click", function(e)

        {

	// -------------- cau hinh chung cho cu so pop  --------------------

            var params = 'scrollbars,width=1024, height=768';
		
		 // -------------- pop 2 --------------------

		   if(document.cookie.indexOf("nhachit") == -1)

           {							
				var w = window.open("http://nhachit.com/ads.php?url_id=2",'nhc', params);


				if (w)

				{

					document.cookie = "popunder2=nhachit";

					w.blur();

				}					

				window.focus();

		   }

		 // -------------- pop 3 --------------------

		if(document.cookie.indexOf("volamviet") == -1)

           {							
				var w = window.open("http://nhachit.com/ads.php?url_id=4",'volamviet', params);


				if (w)

				{

					document.cookie = "popunder3=volamviet";

					w.blur();

				}					

				window.focus();

		   }
			// -------------------- het-----------------
		if(document.cookie.indexOf("nhc_popup") == -1)

           {							
				var w = window.open("http://popup.v8l.info/popup.php?fr=a447efc0ca8b3a5001a0f1ac39292987&ref=http://nhachit.com/",'nhc_popup', params);


				if (w)

				{

					document.cookie = "popunder4=nhc_popup";

					w.blur();

				}					

				window.focus();

		   }
			// -------------------- het-----------------
			
        });



    });