var mypic;
	function affiche(mypic)
	{	document.getElementById(mypic).style.height='100%';
		document.getElementById(mypic).style.width='100%';
		window.scrollTo(0, 0);
	}
	function cache(mypic)
	{	document.getElementById(mypic).style.height='0';
		document.getElementById(mypic).style.width='0';
	}