var zindex = 1;
		
		var photochange = function(){
			$('menu01').addEvent('mouseover', function(){
				$('photo_1').setStyle('z-index', zindex++);
				$('photo_1').setOpacity(1);
			});
			$('menu02').addEvent('mouseover', function(){
				$('photo_2').setStyle('z-index', zindex++);
				$('photo_2').setOpacity(1);
			});
			$('menu03').addEvent('mouseover', function(){
				$('photo_3').setStyle('z-index', zindex++);
				$('photo_3').setOpacity(1);
			});
			$('menu04').addEvent('mouseover', function(){
				$('photo_4').setStyle('z-index', zindex++);
				$('photo_4').setOpacity(1);
			});
			$('menu01').addEvent('mouseout', changestop);
			$('menu02').addEvent('mouseout', changestop);
			$('menu03').addEvent('mouseout', changestop);
			$('menu04').addEvent('mouseout', changestop);
		}
		var changestop = function () {
				$('photo_0').setStyle('z-index', zindex++);
				$('photo_0').setOpacity(1);
		}
		window.addEvent('load', photochange, false);