用javascript怎样计算购物车价格
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/*计算总价格*/
var totalPrice=0;
for(var a=1;a<3;a++){
var quantity=document.getElementById("quantity"+a).value;
var price=document.getElementById("price"+a).value;
var smallTotal=quantity*price;
totalPrice=totalPrice+smallTotal;
}
var total=document.getElementById("total");
total.innerHTML=totalPrice;
}
</script>
<script type="text/javascript">
function initialize()
{
var totalPrice=0;
for(var a=1;a<3;a++){
var quantity=document.getElementById("quantity"+a).value;
var price=document.getElementById("price"+a).value;
var smallTotal=quantity*price;
totalPrice=totalPrice+smallTotal;
/*alert(smallTotal);*/
var smallT=document.getElementById("smallTotal"+a);
smallT.innerHTML=smallTotal;
}
/*取出购物车的所有商品的价格总和*/
var total=document.getElementById("total");
total.innerHTML=totalPrice;
}
</script>
<style type="text/css">
#imgtest {
position: absolute;
top: 100px;
left: 400px;
z-index: 1;
}
table {
left: 100px;
font-size: 20px;
}
</style>
</head>
<body onload="initialize()">
<div id="imgtest"></div>
<br />
<br />
<table border="1" style="text-align: center;" align="center">
<thead style="height: 50">
<td style="WIDTH: 300px">
商品名称
</td>
<td style="WIDTH: 60px">
图片
</td>
<td style="WIDTH: 170px">
数量
</td>
<td style="WIDTH: 170px">
价格
</td>
<td style="WIDTH: 250px">
小计
</td>
</thead>
<tbody>
<tr>
<td class="name">商品1</td>
<td class="image">
<img src="1.jpg" width="40px" height="40px" id="image1" />
</td>
<td class="quantity">
<input id="quantity1" value="1" onblur="total(1);" />
</td>
<td class="price">
<input type="hidden" id="price1" value="20" />
20
</td>
<td class="total">
<span id="smallTotal1"></span> 元
</td>
</tr>
<tr>
<td class="name">商品2</td>
<td class="image">
<img src="1.jpg" width="40px" height="40px" id="image1" />
</td>
<td class="quantity">
<input id="quantity2" value="2" onblur="total(2);" />
</td>
<td class="price">
<input type="hidden" id="price2" value="30" />
30
</td>
<td class="total">
<span id="smallTotal2"></span> 元
</td>
</tr>
<tr>
<td colspan="4" class="cart_total">
<br>
</td>
<td>
<span class="red">总计:</span><span id="total"></span> 元
</td>
</tr>
</tbody>
</table>
</body>
</html>
var totalPrice=0;
for(var a=1;a<3;a++){
var quantity=document.getElementById("quantity"+a).value;
var price=document.getElementById("price"+a).value;
var smallTotal=quantity*price;
totalPrice=totalPrice+smallTotal;
}
var total=document.getElementById("total");
total.innerHTML=totalPrice;
}
</script>
<script type="text/javascript">
function initialize()
{
var totalPrice=0;
for(var a=1;a<3;a++){
var quantity=document.getElementById("quantity"+a).value;
var price=document.getElementById("price"+a).value;
var smallTotal=quantity*price;
totalPrice=totalPrice+smallTotal;
/*alert(smallTotal);*/
var smallT=document.getElementById("smallTotal"+a);
smallT.innerHTML=smallTotal;
}
/*取出购物车的所有商品的价格总和*/
var total=document.getElementById("total");
total.innerHTML=totalPrice;
}
</script>
<style type="text/css">
#imgtest {
position: absolute;
top: 100px;
left: 400px;
z-index: 1;
}
table {
left: 100px;
font-size: 20px;
}
</style>
</head>
<body onload="initialize()">
<div id="imgtest"></div>
<br />
<br />
<table border="1" style="text-align: center;" align="center">
<thead style="height: 50">
<td style="WIDTH: 300px">
商品名称
</td>
<td style="WIDTH: 60px">
图片
</td>
<td style="WIDTH: 170px">
数量
</td>
<td style="WIDTH: 170px">
价格
</td>
<td style="WIDTH: 250px">
小计
</td>
</thead>
<tbody>
<tr>
<td class="name">商品1</td>
<td class="image">
<img src="1.jpg" width="40px" height="40px" id="image1" />
</td>
<td class="quantity">
<input id="quantity1" value="1" onblur="total(1);" />
</td>
<td class="price">
<input type="hidden" id="price1" value="20" />
20
</td>
<td class="total">
<span id="smallTotal1"></span> 元
</td>
</tr>
<tr>
<td class="name">商品2</td>
<td class="image">
<img src="1.jpg" width="40px" height="40px" id="image1" />
</td>
<td class="quantity">
<input id="quantity2" value="2" onblur="total(2);" />
</td>
<td class="price">
<input type="hidden" id="price2" value="30" />
30
</td>
<td class="total">
<span id="smallTotal2"></span> 元
</td>
</tr>
<tr>
<td colspan="4" class="cart_total">
<br>
</td>
<td>
<span class="red">总计:</span><span id="total"></span> 元
</td>
</tr>
</tbody>
</table>
</body>
</html>
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