求帮修改代码。不知道怎么设置购物车的加减方法，可以使加减不冲突

t.val() 只能是大于等于0的数字，这个一定要判断一下其它的，没看出有什么问题

解决方案 »

  1.   


    <a href="javascript:void(0);" class="min"><div class="fl cir_btn border_2">-</div></a>
    <input class="text_box" name="" type="text" value="1" class="fl jj_text"/>
    <a href="#" class="add"><div class="fl cir_btn border_2">+</div></a>
      $(".add").click(function(){
        var t = $(this).parent().find(".text_box");
        t.val(parseInt(t.val())+1)
        setTotal();
      })
      $(".min").click(function(){
        var t = $(this).parent().find(".text_box")
        t.val(parseInt(t.val())-1)
        setTotal();
      })
      

  2.   


    放进去了不行~是我的问题么= =

    HTML替换了吗？ id都改class
      

  3.   

    顶楼上 用this 点哪个就是哪个
      

  4.   


    放进去了不行~是我的问题么= =

    HTML替换了吗？ id都改class
    替换了~
      

  5.   


    放进去了不行~是我的问题么= =

    HTML替换了吗？ id都改class
    替换了~
    <!doctype html>
    <html>
    <head>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <meta charset="UTF-8">
    <title></title>
    <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport"> 
    <meta content="yes" name="apple-mobile-web-app-capable"> 
    <meta content="black" name="apple-mobile-web-app-status-bar-style"> 
    <meta content="telephone=no" name="format-detection"> 
    <meta name="Description" content="生活更轻松">
    <link href="css/base.css" rel="stylesheet" type="text/css">
    <link href="css/content.css" rel="stylesheet" type="text/css">
    <script type="text/javascript" src="js/jquery.js"></script>
    <script>
            function selectall3()
            {
                var a = document.getElementsByTagName("input");
                for (var i=0; i<a.length; i++)
                    if (a[i].type == "checkbox") a[i].checked =!a[i].checked;
            }
        </script>
        <script>
            $(function(){
                var t = $("#text_box");
                $(".add").click(function(){
                    var t = $(this).parent().find(".text_box");
                    t.val(parseInt(t.val())+1)
                    setTotal();
                })
                $(".min").click(function(){
                    var t = $(this).parent().find(".text_box")
                    t.val(parseInt(t.val())-1)
                    setTotal();
                })
                function setTotal(){
                    $("#total").html((parseInt(t.val())*3.95).toFixed(2));
                }
                setTotal();
            })
        </script>
    </head><body>
    <!--头部 开始-->
    <section>
        <div id="header_wd">
            <div class="c-inav">
                <section><div class="btn_back_l"><a href="http://m.jianke.com"><span></span></a></div></section>
                <section><span>订单确认</span></section>
                <section id="navlist" class="navlist"><img src="images/nav_03.jpg"  width="28" height="28"></section>
            </div>
        </div>
        <div id="navboxwrap">
            <!-- #include file="/include/mjianke/topnav.html" -->
        </div>
        <script>
            $(document).ready(function () {
                $("#navlist").toggle(function () { $("#navbox").addClass("navboxshow"); }, function () { $("#navbox").removeClass("navboxshow"); },2000);
            });
        </script></section><div id="personal">
        <div class="xg2">        <div class="shoppingc_head underline2">
                <span class="fl span_con span_left marl20 ">共&nbsp;<span class="red">2</span>&nbsp;件商品</span>
                <a href="#" onclick="javascript:selectall3()" name=All><div class="bor_radius alls fl border_2 shadebg">全选</div></a>
            </div>        <div class="mart15">
                <div class="shoppinglist bor_radius border_2 t_a_l">
                    <div class="list_l fl rel">
                        <div id="holder" class="cart_dw">
                            <input type="checkbox" id="checkbox-2-2" class="regular-checkbox big-checkbox" /><label for="checkbox-2-2"></label></div>
                        <a href="#"><img src="images/waitpain_03.gif" width="14" height="16" class="imgdel_dw"></a>
                    </div>
                    <div class="list_c fl bor_radius border_2 rel"><img src="images/waitpain_07.jpg" width="35" height="52" class="imglist_dw"></div>
                    <div class="list_r fl fn12 rel">
                        <p>渔夫堡牌胶原蛋白维C粉<br />
                            规格：2.5g*20袋<br />
                            <span class="del_line">市场价：￥1700</span><br />
                            <span class="red">健客价：￥1700</span><br /></p>
                        数量：
                        <div class="jj_btn">
                            <a href="javascript:void(0);" class="min"><div class="fl cir_btn border_2">-</div></a>
                            <input class="text_box" name="" type="text" value="1" class="fl jj_text"/>
                            <a href="#" class="add"><div class="fl cir_btn border_2">+</div></a>
                        </div></div>
                    <div class="clearfix"></div>
                </div>
            </div>
            <div class="shoppinglist bor_radius border_2 t_a_l">
                <div class="list_l fl rel">
                    <div id="holder" class="cart_dw"><input type="checkbox" id="checkbox-2-1" class="regular-checkbox big-checkbox" /><label for="checkbox-2-1"></label></div>
                    <a href="#"><img src="images/waitpain_03.gif" width="14" height="16" class="imgdel_dw"></a>
                </div>
                <div class="list_c fl bor_radius border_2 rel"><img src="images/waitpain_07.jpg" width="35" height="52" class="imglist_dw"></div>
                <div class="list_r fl fn12 rel">
                    <p>渔夫堡牌胶原蛋白维C粉<br />
                        规格：2.5g*20袋<br />
                        <span class="del_line">市场价：￥1700</span><br />
                        <span class="red">健客价：￥1700</span><br /></p>
                    数量：
                    <div class="jj_btn" >
                        <a href="javascript:void(0);" class="min"><div class="fl cir_btn border_2">-</div></a>
                        <input class="text_box" name="" type="text" value="1" class="fl jj_text"/>
                        <a href="#" class="add"><div class="fl cir_btn border_2">+</div></a>
                    </div></div>
                <div class="clearfix"></div>
            </div>        <div class="price_detial t_a_l">
                <p>已选择<span class="red">3</span>件商品<br />
                    价　　格：&yen;15.00<br />
                    优　　惠：&yen;0.00<br />
                    合　　计：&yen;<span class="red">280.00</span></p>
            </div>
            <div class="btn9">
                <a href="#" >
                    <span class="con_btn bg_color fl bor_radius4 fn16 white">结&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;算</span>
                </a>
            </div>
            <div class="btn9">
                <a href="#" >
                    <span class="con_btn fl bor_radius4 fn16 border_2">继续购物</span>
                </a>
            </div>
        </div>
    </div>
    <footer></footer>
    </body>
    </html>
      

  6.   

    $(document).on('click','.add',function(){})