// roll sur bouton image
// mouseover / mouseout
function _bouton_go(t,n,imgAChanger){
	adr = t.getAttribute('src').substring(0,t.getAttribute('src').lastIndexOf('/')+1);
	if(n == 0){t.setAttribute('src',adr+imgAChanger);
	}else if(n == 1){t.setAttribute('src',adr+imgAChanger);
	}
}