层点击事件，和数据处理，ajax 提交数据

car.js  文件

$(".ershou-gcar").click(function(){
		var shopid = $("#shopid").val();//商品id
        var userid = $("#userid").val();//商品名称
        //var password = $("#password").val();//用户id
        $.ajax({
            url:"../User/addusercar.html",
            data:{shopid :shopid, userid : userid},
            type:"post",
            success:function(data){
                //var res = $.parseJSON(data);
                if (data.code == 0) {
                    //跳转到首页
                    window.location.href="../../index.php";
                } else {
                    alert(data.msg);
                }
            }
        });
		//alert("购物车添加成功");

});

$(".ershou-sc").click(function(){
		var shopid = $("#shopid").val();//商品id
        var userid = $("#userid").val();//商品名称
        $.ajax({
            url:"../User/addusershoucang.html",
            data:{shopid :shopid, userid : userid},
            type:"post",
            success:function(data){
                //var res = $.parseJSON(data);
                if (data.code == 0) {
                    //跳转到首页
                    window.location.href="../../index.php";
                } else {
                    alert(data.msg);
                }
            }
        });
		//alert("收藏添加成功");

});

html 文件 一定记得要包含js 文件

<div class="ershou-gcar" id="ershou-gcar">
                <span class="yen"></span>
            </div>
			<div class="ershou-sc" id="ershou-sc">
                <span class="yen"></span>


	<script src="{$base}/App/Public/js/jquery2.1.1.min.js?v=201505252216"></script>
        <script src="{$base}/App/Public/js/jquery.validateform.js?v=201505252216"></script>
        
       <script src="{$base}/App/Public/js/car.js?v=201505252216"></script>

php 文件

public function addusercar(){
	$userid=$_POST['userid'];
	$shopid=$_POST['shopid'];
	if ($userid==''){
	$data['msg']="你还没有登录吧";
	$data['code']="1";
	}
	else{
	//查商品
	$swhere='goods_id='.$shopid;
		$goods =  M('Goods')->where($swhere)->select();		 
		$goods=$goods['0'];
	//查用户信息
		$uwhere='id='.$userid;
		$users =  M('User')->where($uwhere)->select();		 
		$users=$users['0'];
		//xierushuju
		$usercar = M('Car');
		$map['shopid']=$goods['goods_id'];
		$map['shopname']=$goods['goods_name'];
		$map['jine']=$goods['goods_price'];
		$map['stat']='0';
		$map['userid']=$users['id'];
		$map['addtime']=date("Y-m-d H:i:s");		
		$result = $usercar->add($map);
		$data['code']="0";
		
		}
	$this->ajaxReturn($data);
	}