<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>购物车自动计算商品总额</title>
<script type="text/javascript" src="jquery-1.10.2.js"></script>
<script>
$(function(){
$(".o").blur(function(){
var price=$(".o").val();
var num=$(".n").val();
var amount=price*num;
$(".e").val(amount);
})
})
</script>
</head>
<body>
<div style="width:250px;height:200px;background:pink;margin:0 auto;padding:10px;">
<h3>购物车自动计算商品总额</h3>
<form action="" method="post" name="form1">
商品编号：<input type="text" id="o" readonly value="酸牛奶"/><br/>
商品单价：<input type="text" id="o" class="o" value="0.0"/><br/>
库存数量：<input type="text" id="o" class="n" value="35" readonly/><br/>
金额总计：<input type="text" id="o" class="e" value="0.0"/><br/>
</form>
</div>
</body>
</html>
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