var current = 0;
	var swappers = new Array();

	var next_image = 0;

	function set_transparency(obj, n){
		obj.style.filter = 'alpha(opacity=' + n * 2 +')';
		obj.style.MozOpacity = n/50;
		obj.style.opacity = n/50;
	}

	function start_swapping(){
	
		swappers = new Array($('img1'), $('img2'));
			
		for (var i=0;i<swappers.length; i++){
		swappers[i].style.position = 'absolute';
		swappers[i].style.left = '0px';
		swappers[i].style.top = '0px'; 
		}
		

		next_swap();
	}
	
	function next_swap(){
	
		current = 1-current;
	
		swappers[current].src = images[next_image % images.length];
		
		swappers[0].style.zIndex =  99 + current;
		swappers[1].style.zIndex = 100 -current;
		//$('mainmenu').style.zIndex = 101;
		//$('content').style.zIndex = 102;
		//$('transparent').style.zIndex = 101;
	
		setTimeout('set_transparency(swappers[current], 100)', i*50);	
		for (var i=0; i<50; i++){
			op = 50 - i;
			setTimeout('set_transparency(swappers[1-current], ' + op + ')', i*50);
		}	
	
	
		next_image++;	
		setTimeout('next_swap()', 5000);
	}