var timer = 0;
var i = 1;
var img = '';



function definition_timer (temps){
	timer++;
	if(timer == temps*50){
		i++;
		timer = 0;
	}
}

function photo(nom_img, ext_img, nb_img, tps){
	
	if(i<=nb_img){
		img = 'images/partenaires/'+nom_img+i+'.'+ext_img;
		definition_timer(tps);
	} else {
		i = 1;
		img = 'images/partenaires/'+nom_img+i+'.'+ext_img;
		definition_timer(tps);
	}
	
	$("img.apercu").attr({src: img, alt :'image'+i});
	
}