var current_header = 1;
setTimeout("setHeader()", 7000);
function setHeader()
{
	var fx = new Fx.Style('header'+current_header, 'opacity', {duration: 2000});
	fx.start(0);
	
	current_header++;
	if(current_header > 5) current_header = 1;

	$('header'+current_header).setStyles({"display": "block",  "opacity": 0});
	var fx2 = new Fx.Style('header'+current_header, 'opacity', {duration: 2000});
	fx2.start(1);	
	setTimeout("setHeader()", 7000);
}