function showMenu(menuName) 
{
	document.getElementById(menuName).style.display="block";
}

function hideMenu(menuName) 
{
	document.getElementById(menuName).style.display="none";
}

function hideAll()
{
	document.getElementById("About").style.display="none";
	document.getElementById("Courses").style.display="none";
	document.getElementById("Research").style.display="none";
	document.getElementById("Students").style.display="none";
	document.getElementById("Resources").style.display="none";
}