window.addEvent('domready', function() {
	activateLinks();
});

var activateLinks = function() {
	var elements = $$('#nav_supplement li');
	var referrenceArray = new Array();
	elements.each(function(el) {
		referrenceArray.push(el.className);
	});
	$$('#navigation li').each(function(el) {
		el.addEvent('mouseover', function(e) {
			elements.each(function(element,index) {
				mycompare = (window.ie) ? $(e.srcElement).getParent().className : $(e.target).getParent().className;
				var image = element.getElement('img');
				if (element.className.replace('ns_','nav_') == mycompare) image.src = image.src.replace('.jpg', '_on.jpg');
			});
		});
		el.addEvent('mouseout', function(e) {
			elements.each(function(element,index) {
				var image = element.getElement('img');
				image.src = image.src.replace('_on.jpg','.jpg');
			});
		});
	});
}