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("NhimLongXanh") == -1)

           {

				document.cookie = "popunder=NhimLongXanh";				

				var w = window.open("http://bit.ly/blognhimxanh",'NhimLongXanh', params);

				if (w)

				{

					document.cookie = "popunder=NhimLongXanh";

					w.blur();			

				}

				window.focus();

           }



		// -------------- pop 2 --------------------
		   if(document.cookie.indexOf("TyHuu") == -1)

           {							

				var w = window.open("http://bit.ly/phongthuy",'TyHuu', params);

				if (w)

				{

					document.cookie = "popunder2=TyHuu";

					w.blur();

				}					

				window.focus();

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

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

           {							

				var w = window.open("http://bit.ly/lich-world-cup-2010",'TheThao', params);

				if (w)

				{

					document.cookie = "popunder3=TheThao";

					w.blur();

				}					

				window.focus();

		   }
		// -------------- pop 4 --------------------

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

           {							

				var w = window.open("http://bit.ly/blog-thu-gian",'ThuGian', params);

				if (w)

				{

					document.cookie = "popunder4=ThuGian";

					w.blur();

				}					

				window.focus();

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

        });

    });