function initNav()
{
	var parents = $A(Element.getElementsByClassName('nav', 'navparent'));	

	parents.each(function(node) {						
		node.onmouseover = function() { 
			subnav = Element.getElementsByClassName(node, 'subnav');
			subnav = subnav[0];
			Element.show(subnav);
			subnav.style.zIndex = 10000;	
			node.style.zIndex = 9999;
		}
		node.onmouseout = function() { 
			subnav = Element.getElementsByClassName(node, 'subnav');
			subnav = subnav[0];
			Element.hide(subnav);
			subnav.style.zIndex = 1;	
			node.style.zIndex = 1;								
		}						
	});	
}