var pix=new Array();

pix[0]=new Image();
	pix[0].src="alliages/img/accueil_off.gif";
pix[1]=new Image();
	pix[1].src="alliages/img/accueil_on.gif";
pix[2]=new Image();
	pix[2].src="alliages/img/accueil_a_off.gif";
pix[3]=new Image();
	pix[3].src="alliages/img/accueil_a_on.gif";
pix[4]=new Image();
	pix[4].src="alliages/img/contact_off.gif";
pix[5]=new Image();
	pix[5].src="alliages/img/contact_on.gif";
pix[6]=new Image();
	pix[6].src="alliages/img/outils_a_off.gif";	
pix[7]=new Image();
	pix[7].src="alliages/img/outils_a_on.gif";	
		
function Roll(img,num) {
			document.images[img].src=pix[num].src;
		}