function OverEffet(zone,events){
	var Zleft = document.getElementById(zone+"_left");
	var Zcent = document.getElementById(zone+"_center");
	var Zright = document.getElementById(zone+"_right");
	
	if(events == 'over')var c1 = '_over';
	if(events == 'out')var c1 = '';
	if(zone == 'backAccueil')var c2 = 'beige';
	if(zone == 'changeLang')var c2 = 'noir';
	
	Zleft.style.backgroundImage="url(medias/images/design/buttons/btt_"+c2+"_right"+c1+".png)"
	Zcent.style.backgroundImage="url(medias/images/design/buttons/btt_"+c2+"_center"+c1+".png)"
	Zright.style.backgroundImage="url(medias/images/design/buttons/btt_"+c2+"_left"+c1+".png)"
}