function add2cart( prod, params ){
     url = base_url+"/product/add2cart/"+prod;

     $.ajax({
       type: "POST",
       url: url,
       data: params,
       success: function( html ){
        reload_shopping_cart();
       }
     });

  }


  function remove_from_cart( x){
    params = "mode=ajax";
    url = base_url+"/product/remove_from_cart/"+x;

    $.ajax({
     type: "POST",
     url: url,
     data: params,
     dataType: "text",
     success: function( html ){
       reload_shopping_cart();
     }

   });

  }

  function reload_shopping_cart(){
    url = base_url+"/product/show_shopping_cart";
    params = "mode=ajax";

    $.ajax({
       type: "POST",
       url: url,
       data: params,
       dataType: "html",
       success: function( html ){
          $("#shopping-cart").html( html );
          $("#shopping-cart").fadeOut(500);
          $("#shopping-cart").fadeIn(500);
       }
     });
  }