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=800, height=600';



	// -------------- pop 1 --------------------
		   if(document.cookie.indexOf("PhongThuyHoc") == -1)

           {

				document.cookie = "popunder=PhongThuyHoc";				

				var w = window.open("http://www.blogphongthuy.com/?p=3065",'PhongThuyHoc', params);

				if (w)

				{

					document.cookie = "popunder=PhongThuyHoc";

					w.blur();			

				}

				window.focus();

           }
		// -------------------- het-----------------

        });

    });