function rollover(name) {
	
	document.getElementById("hostels").style.visibility = "hidden";
	document.getElementById("programs").style.visibility = "hidden";
	document.getElementById("about").style.visibility = "hidden";
	document.getElementById("calendar").style.visibility = "hidden";
	document.getElementById("hiusa").style.visibility = "hidden";
	
	document.getElementById(name).style.visibility = "visible";
	
}

function hide_all() {
	
	document.getElementById("hostels").style.visibility = "hidden";
	document.getElementById("programs").style.visibility = "hidden";
	document.getElementById("about").style.visibility = "hidden";
	document.getElementById("calendar").style.visibility = "hidden";
	document.getElementById("hiusa").style.visibility = "hidden";
	
}