Event.observe(window, "load", function(){
		$$(".light").invoke("observe", 'mouseover', lighton);
		$$(".light").invoke("observe", 'mouseout', lightdown);
	});

	function lighton(ev){
		var tag = ev.element();
		tag.setOpacity(0.75);
	}
	
	function lightdown(ev){
		var tag = ev.element();
		tag.setOpacity(1.00);
	}
	
function _scrollTo(id){
	new Effect.ScrollTo(id,{duration: 2});
}