function changeDisplay(el){
	thisel = document.getElementById(el).style;
	
	for(var i=1; i<=changeDisplayCount; i++)
		if( el != ("area"+i))
			document.getElementById("area"+i).style.display = "none";
	
	if(thisel.display == "none")
		thisel.display="inline";
	else thisel.display="none";

}