var melyikdiv;
function Menuzar(melyik)
	{
	 if(melyik != "ujdonsag")
		{
		 melyikdiv = document.getElementById("ujdmenu");
		 if(melyikdiv.style.visibility == "visible") melyikdiv.style.visibility = "hidden";
		}
	 if(melyik != "oktatas")
		{
		 melyikdiv = document.getElementById("oktatmenu");
		 if(melyikdiv.style.visibility == "visible") melyikdiv.style.visibility = "hidden";
		}
	 if(melyik != "forum")
		{
		 melyikdiv = document.getElementById("forummenu");
		 if(melyikdiv.style.visibility == "visible") melyikdiv.style.visibility = "hidden";
		}
	}