// JavaScript Document
var larg_base = 313;
function defil(sens){
	var new_left = parseInt(document.getElementById('liste').style.left)+(larg_base*sens*3);
	if(new_left>0 ){
		new_left=0;
	}
	if(new_left<(nbprods-3)*larg_base*-1){
		new_left=(nbprods-3)*larg_base*-1;
	}
	
	document.getElementById('liste').style.left=new_left+'px';
}