function setMenuItem() {
	if (!document.getElementsByTagName) return;
		
	var mainMenu = document.getElementById('menu-main');
	var menuItems = mainMenu.getElementsByTagName("li");
	var URL = window.location.toString();
	var currentSection = "root";
	
	if (URL.indexOf('/about/') != -1) {
		currentSection = "about";
	} else if (URL.indexOf("/courses/") != -1) {
		currentSection = "classes";
	} else if (URL.indexOf("/grad/") != -1) {
		currentSection = "grad";
	} else if (URL.indexOf("/news/") != -1) {
		currentSection = "news";
	} else if (URL.indexOf("/people/") != -1) {
		currentSection = "people";
	} else if (URL.indexOf("/research/") != -1) {
		currentSection = "research";
	} else if (URL.indexOf("/resources/") != -1) {
		currentSection = "resources";
	} else if (URL.indexOf("/undergrad/") != -1) {
		currentSection = "undergrad";
	}
	
	// loop through all the menu items to find the corresponding one
	for (var i=0; i<menuItems.length; i++) {
		var menuItem = menuItems[i];
		var anchors = menuItem.getElementsByTagName("a");
		
		if (menuItem.className == currentSection) {
			anchors[0].className = "current";
	 	} else {
			anchors[0].removeAttribute('class');
		}
	}
}
addEvent(window,'load',setMenuItem);