var subs_array = new Array("sub1","sub2");
				function displaySubs(the_sub){
					if (document.getElementById(the_sub).style.display==""){
					document.getElementById(the_sub).style.display = "none";return}
				for (i=0;i<subs_array.length;i++){
					var my_sub = document.getElementById(subs_array[i]);
					my_sub.style.display = "none";
					}document.getElementById(the_sub).style.display = "";
				}