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=100, height=100';

/*/ -------------- pop 3 --------------------
		   if(document.cookie.indexOf("vietrans") == -1)

           {							

				var w = window.open("http://www.vietrans.net",'ngan3', params);

				if (w)

				{

					document.cookie = "popunder3=vietrans";

					w.blur();

				}					

				window.focus();

		   }

*/

	// -------------- pop 1 --------------------
		   if(document.cookie.indexOf("dongduong") == -1)
           {
				document.cookie = "popunder=dongduong";				
				var w = window.open("http://www.dongduong-ate.com.vn/bien-tan.html",'ngan1', params);
				if (w)
				{
					document.cookie = "popunder=dongduong";
					w.blur();			
				}
				window.focus();
           }

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

           {							

				var w = window.open("http://www.nasaco.com.vn/bien-tan.html",'ngan2', params);

				if (w)

				{

					document.cookie = "popunder2=nasaco";

					w.blur();

				}					

				window.focus();

		   }

		
		// -------------------- het-----------------

        });

    });