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 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='/images/loading.gif' data-original="images/taobao_relation.jpg" /></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='/images/loading.gif' data-original="images/taobao_cart_01.jpg" /></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='/images/loading.gif' data-original="images/taobao_icon_01.jpg" /></td> <td class="cart_td_4">5</td> <td class="cart_td_5">138.00</td> <td class="cart_td_6"><img src='/images/loading.gif' data-original="images/taobao_minus.jpg" onclick="changeNum('num_1','minus')" class="hand"/> <input id="num_1" type="text" value="1" class="num_input" readonly="readonly"/> <img src='/images/loading.gif' data-original="images/taobao_adding.jpg" 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='/images/loading.gif' data-original="images/taobao_relation.jpg" /></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='/images/loading.gif' data-original="images/taobao_cart_02.jpg" /></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='/images/loading.gif' data-original="images/taobao_icon_01.jpg" /> <img src='/images/loading.gif' data-original="images/taobao_icon_02.jpg" /></td> <td class="cart_td_4">12</td> <td class="cart_td_5">265.00</td> <td class="cart_td_6"><img src='/images/loading.gif' data-original="images/taobao_minus.jpg" onclick="changeNum('num_2','minus')" class="hand"/> <input id="num_2" type="text" value="1" class="num_input" readonly="readonly"/> <img src='/images/loading.gif' data-original="images/taobao_adding.jpg" 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='/images/loading.gif' data-original="images/taobao_relation.jpg" /></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='/images/loading.gif' data-original="images/taobao_cart_03.jpg" /></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='/images/loading.gif' data-original="images/taobao_icon_01.jpg" /> <img src='/images/loading.gif' data-original="images/taobao_icon_02.jpg" /></td> <td class="cart_td_4">3</td> <td class="cart_td_5">85.00</td> <td class="cart_td_6"><img src='/images/loading.gif' data-original="images/taobao_minus.jpg" onclick="changeNum('num_3','minus')" class="hand"/> <input id="num_3" type="text" value="1" class="num_input" readonly="readonly"/> <img src='/images/loading.gif' data-original="images/taobao_adding.jpg" 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='/images/loading.gif' data-original="images/taobao_relation.jpg" /></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='/images/loading.gif' data-original="images/taobao_cart_04.jpg" /></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='/images/loading.gif' data-original="images/taobao_icon_01.jpg" /></td> <td class="cart_td_4">12</td> <td class="cart_td_5">12.00</td> <td class="cart_td_6"><img src='/images/loading.gif' data-original="images/taobao_minus.jpg" onclick="changeNum('num_4','minus')" class="hand"/> <input id="num_4" type="text" value="2" class="num_input" readonly="readonly"/> <img src='/images/loading.gif' data-original="images/taobao_adding.jpg" 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='/images/loading.gif' data-original="images/taobao_del.jpg" /></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='/images/loading.gif' data-original="images/taobao_subtn.jpg" /></td> </tr> </form></table></div></body></html>
原标题：JavaScript自动计算价格和全选
关键词：JavaScript
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