此CSS的对应的是“购物车的功能——界面源码”的内容和“购物车的功能——CSS源码”的内容，希望大家不要乱

$(function(){//点击复选框全选或全不选效果$("#allCheckBox").click(function(){var checked=$(this).is(":checked");$(".cart_td_1").children().attr("checked",checked);});//判断是否全选function ifAllChecked(){var checkedBoxs=$(".cart_td_1").children();var sum=checkedBoxs.size();var k=0;checkedBoxs.each(function(index,dom){if($(dom).is(":checked")) k++;});if(k==sum){$("#allCheckBox").attr("checked",true);}else{$("#allCheckBox").attr("checked",false);}}ifAllChecked();//页面加载完后运行//单选判断$(".cart_td_1").children().click(function(){ifAllChecked();});//计算总价与小计function productCount(){var $tr=$("#shopping").find("tr[id]");var summer=0;var integral=0;$tr.each(function(i,dom){var num=$(dom).children(".cart_td_6").find("input").val();//商品数量var price=num*$(dom).children(".cart_td_5").text();//商品小计$(dom).children(".cart_td_7").html(price);//显示商品小计summer+=price;//总价integral+=$(dom).children(".cart_td_4").text()*num;//积分});$("#total").text(summer);$("#integral").text(integral);}productCount();//页面加载完后运行//商品增加减少，flag为true时增加，flag为false时减少function changeNumber(dom,flag){var $input = $(dom).parent().find("input");var value = $input.val();if(flag){value++;}else{value--;if(value<=0){value=1;alert("宝贝数量必须大于0");}}$input.val(value);productCount();};//点击增加$(".cart_td_6").find("img[alt='minus']").click(function(){changeNumber(this,false);});//点击减少$(".cart_td_6").find("img[alt='add']").click(function(){changeNumber(this,true);});//点击删除$(".cart_td_8").find("a").click(function(){$(this).parent().parent().prev().remove();//删除前一tr$(this).parent().parent().remove();//删除当前trproductCount();});//点击删除所选$("#deleteAll").click(function(){$("#shopping").find("tr[id]").each(function(i,e){var $tr=$(e);var checked=$tr.children(".cart_td_1").children().is(":checked");if(checked){$tr.prev().remove();$tr.remove();}});productCount();});
});