jquery实现购物车加减的方法

当数据库的库存达到最大值的时候  就会弹出

js代码如下

$(function(){
                var t = $("#quantity");
                $("#add").click(function(){
                    if (parseInt(t.val())==({$stock})){
                         //当$("#min")为1时，$("#min")不可读状态
                        alert('已达库存最大值')
                    }else {
                        t.val(parseInt(t.val()));
                        t.val(parseInt(t.val())+1);
                    }
                                    //当按加1时，解除$("#min")不可读状态
                    setTotal();
                })
                $("#min").click(function(){
                    if (parseInt(t.val())>1) {                     //判断数量值大于1时才可以减少
                        t.val(parseInt(t.val())-1)
                    }else{
                        $("#min").attr("disabled","disabled")        //当$("#min")为1时，$("#min")不可读状态
                        alert('数量最少为1')
                    }

                    setTotal();
                })

  选鞋码的时候的ajax代码如下

$("#code38").on('click',function () {
                var bb = $("#code38").val();
                var imga= $("#imga").attr('src');
                var  c=$('#names').text();
                var  jiage=$('#jiage').text();
                var yanse=$("#yanse").text();
                var total=$("#total").text();
                var quantity=$("#quantity").val();
                var style = jiage *quantity
                // console.log(style);
                $('#cc').on('click',function () {
                    $.ajax({
                        type: "post",
                        url: "{:url('admin/details/dda')}",
                        data: {
                            'bb':bb,
                            'c':c,
                            'jiage':jiage,
                            'yanse':yanse,
                            'total':total,
                            'style':style,
                            'imga':imga,
                            'quantity':quantity
                        },
                        dataType: "json"
                    })
                })

            })

php代码如下

 public function  dda(Request $request){

        $desc = $request->param('jiage');
        $title = $request->param('bb');
        $name = $request->param('c');
        $link = $request->param('yanse');
        $total = $request->param('style');
        $imga = $request->param('imga');
        $quantity = $request->param('quantity');

//        $style = $request->param('style');


        $Comm = new  Comm();
        $Comm->name = $name;
        $Comm->title = $title;
        $Comm->link = $link;
        $Comm->desc = $desc;
        $Comm->style = $total;
        $Comm->path = $imga;
        $Comm->num = $quantity;
        $res = $Comm->save();


        if ($res>0){
            $this->success('成功1','index/Details/index');
        }else{
            $this->error('失败1', 'index/Details/index');
        }
    }