<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>10.淘宝商品价格计算实例</title>
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<style type="text/css">
li{line-height: 26px}
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</head>
<body>
<ul id="list">
<li>
<input type="button" value="-">
<strong>0</strong>
<input type="button" value="+">
单价：<em>20元</em>
小计：<span>0元</span>
</li>
<li>
<input type="button" value="-">
<strong>0</strong>
<input type="button" value="+">
单价：<em>12.5元</em>
小计：<span>0元</span>
</li>
<li>
<input type="button" value="-">
<strong>0</strong>
<input type="button" value="+">
单价：<em>12.5元</em>
小计：<span>0元</span>
</li>
<li>
<input type="button" value="-">
<strong>0</strong>
<input type="button" value="+">
单价：<em>12.5元</em>
小计：<span>0元</span>
</li>
<li>
<input type="button" value="-">
<strong>0</strong>
<input type="button" value="+">
单价：<em>12.5元</em>
小计：<span>0元</span>
</li>
</ul>
</body>
</html>
<script type="text/javascript">
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function fn1(oLi){
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var n1=parseFloat(aStrong.innerHTML);
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aBtn[0].onclick=function(){
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aStrong.innerHTML=n1;
aSpan.innerHTML=n1*n2+\'元\';
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aBtn[1].onclick=function(){
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aSpan.innerHTML=n1*n2+\'元\';
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