JavaScript自动计算价格和全选,价格自增加减，复选框，反选，全选。
如图：
如图：
CSS代码 @charset "gb2312";
/* CSS Document */ body{
margin:0px;
padding:0px;
font-size:12px;
line-height:20px;
color:#333;
}
ul,li,ol,h1,dl,dd{
list-style:none;
margin:0px;
padding:0px;
}
a{
color:#1965b3;
text-decoration: none;
}
a:hover{
color:#CD590C;
text-decoration:underline;
}
img{
border:0px;
vertical-align:middle;
}
#header{
height:40px;
margin:10px auto 10px auto;
width:800px;
clear:both;
}
#nav{
margin:10px auto 10px auto;
width:800px;
clear:both;
}
#navlist{
width:800px;
margin:0px auto 0px auto;
height:23px;
}
#navlist li{
float:left;
height:23px;
line-height:26px;
}
.navlist_red_left{
background-image:url(../images/taobao_bg.png);
background-repeat:no-repeat;
background-position:-12px -92px;
width:3px;
}
.navlist_red{
background-color:#ff6600;
text-align:center;
font-size:14px;
font-weight:bold;
color:#FFF;
width:130px;
}
.navlist_red_arrow{
background-color:#ff6600;
background-image:url(../images/taobao_bg.png);
background-repeat:no-repeat;
background-position:0px 0px;
width:13px;
}
.navlist_gray{
background-color:#e4e4e4;
text-align:center;
font-size:14px;
font-weight:bold;
width:150px;
}
.navlist_gray_arrow{
background-color:#e4e4e4;
background-image:url(../images/taobao_bg.png);
background-repeat:no-repeat;
background-position:0px 0px;
width:13px;
}
.navlist_gray_right{
background-image:url(../images/taobao_bg.png);
background-repeat:no-repeat;
background-position:-12px -138px;
width:3px;
}
#content{
width:800px;
margin:10px auto 5px auto;
clear:both;
}
.title_1{
text-align:center;
width:50px;
}
.title_2{
text-align:center;
}
.title_3{
text-align:center;
width:80px;
}
.title_4{
text-align:center;
width:80px;
}
.title_5{
text-align:center;
width:100px;
}
.title_6{
text-align:center;
width:80px;
}
.title_7{
text-align:center;
width:60px;
}
.line{
background-color:#a7cbff;
height:3px;
}
.shopInfo{
padding-left:10px;
height:35px;
vertical-align:bottom;
}
.num_input{
border:solid 1px #666;
width:25px;
height:15px;
text-align:center;
}
.cart_td_1,.cart_td_2,.cart_td_3,.cart_td_4,.cart_td_5,.cart_td_6,.cart_td_7,.cart_td_8{
background-color:#e2f2ff;
border-bottom:solid 1px #d1ecff;
border-top:solid 1px #d1ecff;
text-align:center;
padding:5px;
}
.cart_td_1,.cart_td_3,.cart_td_4,.cart_td_5,.cart_td_6,.cart_td_7{
border-right:solid 1px #FFF;
}
.cart_td_3{
text-align:left;
}
.cart_td_4{
font-weight:bold;
}
.cart_td_7{
font-weight:bold;
color:#fe6400;
font-size:14px;
}
.hand{
cursor:pointer;
}
.shopend{
text-align:right;
padding-right:10px;
padding-bottom:10px;
}
.yellow{
font-weight:bold;
color:#fe6400;
font-size:18px;
line-height:40px;
}
// JavaScript Document /*改变所购商品的数量*/
function changeNum(numId,flag){/*numId表示对应商品数量的文本框ID，flag表示是增加还是减少商品数量*/
var numId=document.getElementById(numId);
if(flag=="minus"){/*减少商品数量*/
if(numId.value<=1){
alert("宝贝数量必须是大于0");
return false;
}
else{
numId.value=parseInt(numId.value)-1;
productCount();
}
}
else{/*flag为add，增加商品数量*/
numId.value=parseInt(numId.value)+1;
productCount();
}
} /*自动计算商品的总金额、总共节省的金额和积分*/
function productCount(){
var total=0; //商品金额总计
var integral=0; //可获商品积分 var point; //每一行商品的单品积分
var price; //每一行商品的单价
var number; //每一行商品的数量
var subtotal; //每一行商品的小计 /*访问ID为shopping表格中所有的行数*/
var myTableTr=document.getElementById("shopping").getElementsByTagName("tr");
if(myTableTr.length>0){
for(var i=1;i<myTableTr.length;i++){/*从1开始，第一行的标题不计算*/
if(myTableTr[i].getElementsByTagName("td").length>2){ //最后一行不计算
point=myTableTr[i].getElementsByTagName("td")[3].innerHTML;
price=myTableTr[i].getElementsByTagName("td")[4].innerHTML;
number=myTableTr[i].getElementsByTagName("td")[5].getElementsByTagName("input")[0].value;
integral+=point*number;
total+=price*number;
myTableTr[i].getElementsByTagName("td")[6].innerHTML=price*number;
}
}
document.getElementById("total").innerHTML=total;
document.getElementById("integral").innerHTML=integral; }
}
window.onload=productCount; /*复选框全选或全不选效果*/
function selectAll(){
var oInput=document.getElementsByName("cartCheckBox");
for (var i=0;i<oInput.length;i++){
oInput[i].checked=document.getElementById("allCheckBox").checked;
}
} /*根据单个复选框的选择情况确定全选复选框是否被选中*/
function selectSingle(){
var k=0;
var oInput=document.getElementsByName("cartCheckBox");
for (var i=0;i<oInput.length;i++){
if(oInput[i].checked==false){
k=1;
break;
}
}
if(k==0){
document.getElementById("allCheckBox").checked=true;
}
else{
document.getElementById("allCheckBox").checked=false;
}
} /*删除单行商品*/
function deleteRow(rowId){
var Index=document.getElementById(rowId).rowIndex; //获取当前行的索引号
document.getElementById("shopping").deleteRow(Index);
document.getElementById("shopping").deleteRow(Index-1);
productCount();
} /*删除选中行的商品*/
function deleteSelectRow(){
var oInput=document.getElementsByName("cartCheckBox");
var Index;
for (var i=oInput.length-1;i>=0;i--){
if(oInput[i].checked==true){
Index=document.getElementById(oInput[i].value).rowIndex; /*获取选中行的索引号*/
document.getElementById("shopping").deleteRow(Index);
document.getElementById("shopping").deleteRow(Index-1);
}
}
productCount();
}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>淘宝购物车页面</title>
<link href="css/myCart.css" type="text/css" rel="stylesheet" />
<script type="text/javascript" src="js/myCart.js"></script>
</head> <body>
<div id="header"><img src="data:images/taobao_logo.gif" alt="logo" /></div>
<div id="nav">您的位置：<a href="#">首页</a> > <a href="#">我的淘宝</a> > 我的购物车</div>
<div id="navlist">
<ul>
<li class="navlist_red_left"></li>
<li class="navlist_red">1. 查看购物车</li>
<li class="navlist_red_arrow"></li>
<li class="navlist_gray">2. 确认订单信息</li>
<li class="navlist_gray_arrow"></li>
<li class="navlist_gray">3. 付款到支付宝</li>
<li class="navlist_gray_arrow"></li>
<li class="navlist_gray">4. 确认收货</li>
<li class="navlist_gray_arrow"></li>
<li class="navlist_gray">5. 评价</li>
<li class="navlist_gray_right"></li>
</ul>
</div> <div id="content">
<table width="100%" border="0" cellspacing="0" cellpadding="0" id="shopping">
<form action="" method="post" name="myform">
<tr>
<td class="title_1"><input id="allCheckBox" type="checkbox" value="" onclick="selectAll()" />全选</td>
<td class="title_2" colspan="2">店铺宝贝</td>
<td class="title_3">获积分</td>
<td class="title_4">单价（元）</td>
<td class="title_5">数量</td>
<td class="title_6">小计（元）</td>
<td class="title_7">操作</td>
</tr>
<tr>
<td colspan="8" class="line"></td>
</tr>
<tr>
<td colspan="8" class="shopInfo">店铺：<a href="#">纤巧百媚时尚鞋坊</a> 卖家：<a href="#">纤巧百媚</a> <img src="data:images/taobao_relation.jpg" alt="relation" /></td>
</tr>
<tr id="product1">
<td class="cart_td_1"><input name="cartCheckBox" type="checkbox" value="product1" onclick="selectSingle()" /></td>
<td class="cart_td_2"><img src="data:images/taobao_cart_01.jpg" alt="shopping"/></td>
<td class="cart_td_3"><a href="#">日韩流行风时尚美眉最爱独特米字拼图金属坡跟公主靴子黑色</a><br />
颜色：棕色 尺码：37<br />
保障：<img src="data:images/taobao_icon_01.jpg" alt="icon" /></td>
<td class="cart_td_4">5</td>
<td class="cart_td_5">138.00</td>
<td class="cart_td_6"><img src="data:images/taobao_minus.jpg" alt="minus" onclick="changeNum('num_1','minus')" class="hand"/> <input id="num_1" type="text" value="1" class="num_input" readonly="readonly"/> <img src="data:images/taobao_adding.jpg" alt="add" onclick="changeNum('num_1','add')" class="hand"/></td>
<td class="cart_td_7"></td>
<td class="cart_td_8"><a href="javascript:deleteRow('product1');">删除</a></td>
</tr> <tr>
<td colspan="8" class="shopInfo">店铺：<a href="#">香港我的美丽日记</a> 卖家：<a href="#">lokemick2009</a> <img src="data:images/taobao_relation.jpg" alt="relation" /></td>
</tr>
<tr id="product2">
<td class="cart_td_1"><input name="cartCheckBox" type="checkbox" value="product2" onclick="selectSingle()" /></td>
<td class="cart_td_2"><img src="data:images/taobao_cart_02.jpg" alt="shopping"/></td>
<td class="cart_td_3"><a href="#">chanel/香奈尔/香奈尔炫亮魅力唇膏3.5g</a><br />
保障：<img src="data:images/taobao_icon_01.jpg" alt="icon" /> <img src="data:images/taobao_icon_02.jpg" alt="icon" /></td>
<td class="cart_td_4">12</td>
<td class="cart_td_5">265.00</td>
<td class="cart_td_6"><img src="data:images/taobao_minus.jpg" alt="minus" onclick="changeNum('num_2','minus')" class="hand"/> <input id="num_2" type="text" value="1" class="num_input" readonly="readonly"/> <img src="data:images/taobao_adding.jpg" alt="add" onclick="changeNum('num_2','add')" class="hand"/></td>
<td class="cart_td_7"></td>
<td class="cart_td_8"><a href="javascript:deleteRow('product2');">删除</a></td>
</tr> <tr>
<td colspan="8" class="shopInfo">店铺：<a href="#">实体经营</a> 卖家：<a href="#">林颜店铺</a> <img src="data:images/taobao_relation.jpg" alt="relation" /></td>
</tr>
<tr id="product3">
<td class="cart_td_1"><input name="cartCheckBox" type="checkbox" value="product3" onclick="selectSingle()"/></td>
<td class="cart_td_2"><img src="data:images/taobao_cart_03.jpg" alt="shopping"/></td>
<td class="cart_td_3"><a href="#">蝶妆海晳蓝清滢粉底液10#（象牙白）</a><br />
保障：<img src="data:images/taobao_icon_01.jpg" alt="icon" /> <img src="data:images/taobao_icon_02.jpg" alt="icon" /></td>
<td class="cart_td_4">3</td>
<td class="cart_td_5">85.00</td>
<td class="cart_td_6"><img src="data:images/taobao_minus.jpg" alt="minus" onclick="changeNum('num_3','minus')" class="hand"/> <input id="num_3" type="text" value="1" class="num_input" readonly="readonly"/> <img src="data:images/taobao_adding.jpg" alt="add" onclick="changeNum('num_3','add')" class="hand"/></td>
<td class="cart_td_7"></td>
<td class="cart_td_8"><a href="javascript:deleteRow('product3');">删除</a></td>
</tr> <tr>
<td colspan="8" class="shopInfo">店铺：<a href="#">红豆豆的小屋</a> 卖家：<a href="#">taobao豆豆</a> <img src="data:images/taobao_relation.jpg" alt="relation" /></td>
</tr>
<tr id="product4">
<td class="cart_td_1"><input name="cartCheckBox" type="checkbox" value="product4" onclick="selectSingle()" /></td>
<td class="cart_td_2"><img src="data:images/taobao_cart_04.jpg" alt="shopping"/></td>
<td class="cart_td_3"><a href="#">相宜促销专供 大S推荐 最好用的LilyBell化妆棉</a><br />
保障：<img src="data:images/taobao_icon_01.jpg" alt="icon" /></td>
<td class="cart_td_4">12</td>
<td class="cart_td_5">12.00</td>
<td class="cart_td_6"><img src="data:images/taobao_minus.jpg" alt="minus" onclick="changeNum('num_4','minus')" class="hand"/> <input id="num_4" type="text" value="2" class="num_input" readonly="readonly"/> <img src="data:images/taobao_adding.jpg" alt="add" onclick="changeNum('num_4','add')" class="hand"/></td>
<td class="cart_td_7"></td>
<td class="cart_td_8"><a href="javascript:deleteRow('product4');">删除</a></td>
</tr> <tr>
<td colspan="3"><a href="javascript:deleteSelectRow()"><img src="data:images/taobao_del.jpg" alt="delete"/></a></td>
<td colspan="5" class="shopend">商品总价（不含运费）：<label id="total" class="yellow"></label> 元<br />
可获积分 <label class="yellow" id="integral"></label> 点<br />
<input name=" " type="image" src="data:images/taobao_subtn.jpg" /></td>
</tr>
</form>
</table> </div>
</body>
</html>