function appelSlider(nbImages,vitesse,description){

	var tabLiens = $('#inner_frise a');
	$('#next').click(function(){
		if(tabLiens[current+nbImages]){
			var nLeft = Math.round($(tabLiens[current+nbImages]).position().left);
			$('#inner_frise').stop().animate({'left':-nLeft},vitesse);
			current = current+nbImages;
			if(description){
				changerDescription(tabLiens[current]);
			}
		}
	});
	$('#prev').click(function(){
		if(tabLiens[current-nbImages]){
			var nLeft = Math.round($(tabLiens[current-nbImages]).position().left);
			$('#inner_frise').stop().animate({'left':-nLeft},vitesse);
			current = current-nbImages;
			if(description){
				changerDescription(tabLiens[current]);
			}
		}
	});		
	
	changerDescription(tabLiens[current]);
}

function changerDescription(obj){
	var alt = $(obj).children(':first').attr('alt');
		$('#descriptionImage').html(alt);	
}