function changer_eclairage()
{
	if(document.body.getStyle('background-color')=='#000000')
	{
		document.body.morph({'background-color':'#fff','color':'#000'});
		$('navigation').morph({'background-color':'#fff','color':'#000'});
		$('footer').morph({'background-color':'#fff','color':'#000'});
		$$('a','h1').each(function(el){
			el.morph({'color':'#111'});
		});
	}
	else
	{
		document.body.morph({'background-color':'#000','color':'#fff'});
		$('navigation').morph({'background-color':'#000','color':'#fff'});
		$('footer').morph({'background-color':'#000','color':'#fff'});
		$$('a','h1').each(function(el){
			el.morph({'color':'#eee'});
		});
	}	
}