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java42-20170821DiYiZhangDiErZhang
/
shopping1.html

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>完善当当购物车页面</title>
    <link type="text/css" rel="stylesheet" href="css/cartStyle1.css" />
    <script type="text/javascript">

    	function total(){
    		var prices=document.getElementsByName("price");
    		var count=document.getElementsByName("amount");
    		var sum=0;
    		for (var i=0;i<prices.length;i++) {
    			sum+=prices[i].value*count[i].value;
    		}
    		document.getElementById("totalPrice").innerHTML="¥"+sum;
    	}
    	function total1(num){
    		var prices=document.getElementsByName("price")[num].value;
    		var count=parseInt(document.getElementsByName("amount")[num].value)+1;
    		if(count<1){
    			alert("不能再减了，再减就没有啦！")
    		}else{
    			document.getElementsByName("amount")[num].value=count;
    			var totals=parseFloat(prices*count);
    			document.getElementById("price"+num).innerHTML="¥"+totals;
    		}
    	}
    	function total2(num){
    		var prices=document.getElementsByName("price")[num].value;
    		var count=parseInt(document.getElementsByName("amount")[num].value)-1;
    		if(count<1){
    			alert("不能再减了，再减就没有啦！")
    		}else{
    			document.getElementsByName("amount")[num].value=count;
    			var totals=parseFloat(prices*count);
    			document.getElementById("price"+num).innerHTML="¥"+totals;
    		}
    	}
    </script>
</head>
<body onload="total()">

<div class="content">
    <div class="logo">
        <img src="images/dd_logo.jpg"><span>关闭</span>
    </div>
    <div class="cartList">
        <ul>
            <li>¥<input type="text" name="price" value="21.90"></li>
            <li><input type="button" name="minus" value="-" onclick="total2(0),total()"><input type="text" name="amount" value="1"><input onclick="total1(0),total()" type="button" name="plus" value="+"></li>
            <li id="price0">¥21.90</li>
            <li><p>移入收藏</p><p>删除</p></li>
        </ul>
        <ul>
            <li>¥<input type="text" name="price" value="24.00"></li>
            <li><input type="button" name="minus" value="-" onclick="total2(1),total()"><input type="text" name="amount" value="1"><input type="button" name="plus" value="+" onclick="total1(1),total()"></li>
            <li id="price1">¥24.00</li>
            <li><p>移入收藏</p><p>删除</p></li>
        </ul>
        <ol>
            <li id="totalPrice">&nbsp;</li>
            <li><span>结 算</span></li>
        </ol>
    </div>
</div>
</body>
</html>