var root = "/";

Event.observe(window, 'load', function(){		
	
	var footer = $("footer").offsetTop;		
	$("nav").setStyle({ height : footer + "px" });	
	
	$("nav").observe("click", function(event){
		
		var element = event.element();
		
		if(element.readAttribute("id") == "home-nav")
			window.location = root + "index.php";	
		
		if(element.readAttribute("id") == "environmental-nav")
			window.location = root + "environmental/";
			
		if(element.readAttribute("id") == "contact-us-nav")
			window.location = root + "contact/";
			
		if(element.readAttribute("id") == "news-nav")
			window.location = root + "news/";
		
	});			
	
}, false);