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已结题

jsp里面JavaScript代码无效

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>单个商品详细信息</title>
<link rel="stylesheet" type="text/css" href="home/CSS/productInfo.css"> 
<link rel="stylesheet" type="text/css" href="home/CSS/footer.css">
   <link rel="shortcut icon" href="home/img/favicon.ico" type="home/img/favicon.ico"> 

<script type="text/javascript" src="home/JS/jquery.min.js"></script>
<script type="text/javascript" src="home/JS/main.js"></script>

</head>
<body>


<div class="w">
<div class="product-img">
    
        <div class="zoom">
                
            
            <div class="small_area">
                <img src="home/img/${pro.imgurl}" width="400" height="400"/>
                <span class="mask"></span>
                    
                </div>
                
            </div>
            <div class="big_area">
                <img src="home/img/${pro.imgurl}"  width="620" height="620"/>
            </div>
            </div>
</div>
<div class="product-details">
    <h1>${pro.description}</h1>
    <p class="re"><span>积分可抵500元</span><span>购物送积分</span></p>
    <div class="price">
        <span>全球最低价格:&nbsp;&nbsp;</span>
        <span class="price">¥${pro.price }元</span>
    </div>
    <p id="goods_name" ><span>品牌:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>${pro.name }</p>
    
    <ul class="details">
        <li><span>颜色选择:</span><a class="u-check n-check">${pro.color }</a></li>
     
        <c:if test="${not empty pro.memory}">
             <li><span>内存:</span><a class="u-check n-check">${pro.memory }</a></li>
        </c:if>
        
        <li><span>产品类型:</span><a class="u-check n-check">${pro.type }</a></li>
        <li><span>购买数量:</span>
            <div class="count-box">
                    <input class="min" name="" type="button" value="-"/>
                    <input class="text-box" name="num" type="text" value="1" id="num"/>
                    <input class="add" name="" type="button" value="+"/>
                </div>
        </li>
    </ul>
    <div class="action">
           <a class="addCar" onclick="addProductToCart('${pro.id}')"><i></i>加入购物车</a>
           <a class="buy"    onclick="send()" >立即购买</a>
    </div>
</div>


</body>

</html>
<script>
        
        // 获取相应节点元素
        var zoom = document.querySelector('.zoom');
        var simg = document.querySelector('.small_area img');
        var bimg = document.querySelector('.big_area img');
        var big = document.querySelector('.big_area');
        var small = document.querySelector('.small_area');
        var mask = document.querySelector('.mask');
 
        // 设置遮罩层宽高  小图宽 除以 大图宽 乘以 大显示区域边框
        mask.style.width = (simg.offsetWidth/bimg.offsetWidth)*big.clientWidth+"px";
        mask.style.height = (simg.offsetHeight/bimg.offsetHeight)*big.clientHeight+"px";
 
        // 定义遮罩层最大边距,也就是最大移动距离
        var maxW = simg.clientWidth - mask.offsetWidth;
        var maxH = simg.clientHeight - mask.offsetHeight;
 
        // 鼠标移入小显示区域发生事件:1.遮罩层显示 2.大显示区域显示
        small.onmouseenter=function(){
            mask.style.left = 0;
            big.style.left = 410+"px";
        }
        // 鼠标移入小显示区域发生事件:1.遮罩层消失 2.大显示区域消失
        small.onmouseleave=function(){
            mask.style.left = -10000+"px";
            big.style.left = -10000+"px";
        }
        // 鼠标在小显示区域移动
        small.onmousemove=function(e){
            // 解决兼容问题
            e = e || window.event;
            // 定义两个变量 让鼠标位置一直处于遮罩层位置中间
            var nLeft = e.pageX-zoom.offsetLeft-zoom.clientLeft-mask.offsetWidth/2;
            var nTop = e.pageY-zoom.offsetTop-zoom.clientTop-mask.offsetHeight/2;
 
            // 设置遮罩层永远显示在小显示区域内部 也就是判断nLeft、nTop值
            nLeft = Math.min(maxW,Math.max(0,nLeft));
            nTop = Math.min(maxH,Math.max(0,nTop));
 
            // 遮罩层位置
            mask.style.left = nLeft+"px";
            mask.style.top = nTop+"px";
 
            // 设置大图片移动位置 跟随遮罩层百分比移动(语法带入)
            bimg.style.left = -(bimg.offsetWidth-big.clientWidth)*(nLeft/(simg.clientWidth-mask.offsetWidth))+"px";        
            bimg.style.top = -(bimg.offsetHeight-big.clientHeight)*(nTop/(simg.clientHeight-mask.offsetHeight))+"px";            
 
 
        }
        
    </script>
    <script type="text/javascript">
        var span=document.getElementsByTagName('a');
        span.Style.color='black';
    </script>



```

  • 写回答

2条回答 默认 最新

  • 神仙别闹 2021-12-30 08:51
    关注

    script放的位置不对,需要放到 </body> 的上面。

    <%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
     <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    
        <title>单个商品详细信息</title>
        <link rel="stylesheet" type="text/css" href="home/CSS/productInfo.css">
        <link rel="stylesheet" type="text/css" href="home/CSS/footer.css">
        <link rel="shortcut icon" href="home/img/favicon.ico" type="home/img/favicon.ico">
    
        <script type="text/javascript" src="home/JS/jquery.min.js"></script>
        <script type="text/javascript" src="home/JS/main.js"></script>
    
    </head>
    <body>
    
    
        <div class="w">
            <div class="product-img">
    
                <div class="zoom">
    
    
                    <div class="small_area">
                        <img src="home/img/${pro.imgurl}" width="400" height="400" />
                        <span class="mask"></span>
    
                    </div>
    
                </div>
                <div class="big_area">
                    <img src="home/img/${pro.imgurl}" width="620" height="620" />
                </div>
            </div>
        </div>
        <div class="product-details">
            <h1>${pro.description}</h1>
            <p class="re"><span>积分可抵500元</span><span>购物送积分</span></p>
            <div class="price">
                <span>全球最低价格:&nbsp;&nbsp;</span>
                <span class="price">¥${pro.price }元</span>
            </div>
            <p id="goods_name"><span>品牌:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>${pro.name }</p>
    
            <ul class="details">
                <li><span>颜色选择:</span><a class="u-check n-check">${pro.color }</a></li>
    
                <c:if test="${not empty pro.memory}">
                    <li><span>内存:</span><a class="u-check n-check">${pro.memory }</a></li>
                </c:if>
    
                <li><span>产品类型:</span><a class="u-check n-check">${pro.type }</a></li>
                <li>
                    <span>购买数量:</span>
                    <div class="count-box">
                        <input class="min" name="" type="button" value="-" />
                        <input class="text-box" name="num" type="text" value="1" id="num" />
                        <input class="add" name="" type="button" value="+" />
                    </div>
                </li>
            </ul>
            <div class="action">
                <a class="addCar" onclick="addProductToCart('${pro.id}')"><i></i>加入购物车</a>
                <a class="buy" onclick="send()">立即购买</a>
            </div>
        </div>
        <script>
    
            // 获取相应节点元素
            var zoom = document.querySelector('.zoom');
            var simg = document.querySelector('.small_area img');
            var bimg = document.querySelector('.big_area img');
            var big = document.querySelector('.big_area');
            var small = document.querySelector('.small_area');
            var mask = document.querySelector('.mask');
    
            // 设置遮罩层宽高  小图宽 除以 大图宽 乘以 大显示区域边框
            mask.style.width = (simg.offsetWidth / bimg.offsetWidth) * big.clientWidth + "px";
            mask.style.height = (simg.offsetHeight / bimg.offsetHeight) * big.clientHeight + "px";
    
            // 定义遮罩层最大边距,也就是最大移动距离
            var maxW = simg.clientWidth - mask.offsetWidth;
            var maxH = simg.clientHeight - mask.offsetHeight;
    
            // 鼠标移入小显示区域发生事件:1.遮罩层显示 2.大显示区域显示
            small.onmouseenter = function () {
                mask.style.left = 0;
                big.style.left = 410 + "px";
            }
            // 鼠标移入小显示区域发生事件:1.遮罩层消失 2.大显示区域消失
            small.onmouseleave = function () {
                mask.style.left = -10000 + "px";
                big.style.left = -10000 + "px";
            }
            // 鼠标在小显示区域移动
            small.onmousemove = function (e) {
                // 解决兼容问题
                e = e || window.event;
                // 定义两个变量 让鼠标位置一直处于遮罩层位置中间
                var nLeft = e.pageX - zoom.offsetLeft - zoom.clientLeft - mask.offsetWidth / 2;
                var nTop = e.pageY - zoom.offsetTop - zoom.clientTop - mask.offsetHeight / 2;
    
                // 设置遮罩层永远显示在小显示区域内部 也就是判断nLeft、nTop值
                nLeft = Math.min(maxW, Math.max(0, nLeft));
                nTop = Math.min(maxH, Math.max(0, nTop));
    
                // 遮罩层位置
                mask.style.left = nLeft + "px";
                mask.style.top = nTop + "px";
    
                // 设置大图片移动位置 跟随遮罩层百分比移动(语法带入)
                bimg.style.left = -(bimg.offsetWidth - big.clientWidth) * (nLeft / (simg.clientWidth - mask.offsetWidth)) + "px";
                bimg.style.top = -(bimg.offsetHeight - big.clientHeight) * (nTop / (simg.clientHeight - mask.offsetHeight)) + "px";
    
    
            }
    
        </script>
        <script type="text/javascript">
            var span = document.getElementsByTagName('a');
            span.Style.color = 'black';
        </script>
    
    </body>
    
    </html>
    

    如有帮助,采纳支持一下,谢谢。

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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  • 系统已结题 1月8日
  • 已采纳回答 12月31日
  • 创建了问题 12月30日

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