<div class="w"> <div id="slideshow"> <img src="../images/pop.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;"> <img src="../images/poc.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;"> </div> <script> function fun() { var a = Math.random() * 5; $('img').attr('src', '../images/pop.gif' + a + '../images/poc.gif'); } </script> </div>
时间: 2024-02-15 08:28:06 浏览: 13
这段代码是一个图片轮播的功能。其中,有一个div元素,id为"slideshow",里面包含了两个img元素,分别有不同的图片路径,并且设置了点击事件,触发函数fun()。在fun()函数中,使用Math.random()生成一个0到5之间的随机数a,并通过jQuery修改img元素的src属性,从而实现图片轮播的效果。需要注意的是,这段代码中的路径是相对路径,需要根据实际情况进行修改。
相关问题
用以下代码写一个轮播图<ul> <li><img src="../images/1.jpg" alt=""></li> <li><img src="../images/2.jpg" alt=""></li> <li><img src="../images/3.jpg" alt=""></li> <li><img src="../images/4.jpg" alt=""></li> <li><img src="../images/5.jpg" alt=""></li> <li><img src="../images/6.jpg" alt=""></li> </ul> <span class="prev">❮</span> <span class="next">❯</span> </div> <script src="../jquery-3.7.0.js"></script>
你可以使用以下代码来实现一个基本的轮播图:
```html
<div class="slideshow-container">
<ul class="slides">
<li><img src="../images/1.jpg" alt=""></li>
<li><img src="../images/2.jpg" alt=""></li>
<li><img src="../images/3.jpg" alt=""></li>
<li><img src="../images/4.jpg" alt=""></li>
<li><img src="../images/5.jpg" alt=""></li>
<li><img src="../images/6.jpg" alt=""></li>
</ul>
<span class="prev">❮</span>
<span class="next">❯</span>
</div>
<script src="../jquery-3.7.0.js"></script>
<script>
$(document).ready(function() {
var slideIndex = 1;
showSlides(slideIndex);
$(".prev").click(function() {
showSlides(slideIndex -= 1);
});
$(".next").click(function() {
showSlides(slideIndex += 1);
});
function showSlides(n) {
var i;
var slides = $(".slides li");
if (n > slides.length) {
slideIndex = 1
}
if (n < 1) {
slideIndex = slides.length
}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
slides[slideIndex - 1].style.display = "block";
}
});
</script>
```
CSS代码如下:
```css
.slideshow-container {
position: relative;
margin: auto;
}
.slides {
list-style: none;
padding: 0;
margin: 0;
}
.slides li {
display: none;
}
.prev, .next {
position: absolute;
top: 50%;
width: auto;
margin-top: -22px;
padding: 16px;
color: white;
font-weight: bold;
font-size: 18px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
}
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
.prev:hover, .next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
.slides li img {
width: 100%;
height: auto;
}
```
这里的核心是使用 JavaScript 来控制轮播图。`showSlides(n)` 函数用于显示当前轮播图,其中参数 `n` 表示轮播图的索引号。通过点击“上一页”和“下一页”按钮,可以切换轮播图。在这个例子中,我们使用了 jQuery 库来简化 JavaScript 代码。
<div class="w"> <div id="slideshow"> <img src="../images/pop.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;"> <img src="../images/poc.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;"> </div> <script> function fun() { var a = Math.random() * 5; $('img').attr('src', '../images/pop.gif' + a + '../images/poc.gif'); } </script> </div>无法实现
这段代码无法实现图片轮播的功能,因为在fun()函数中的图片路径拼接方式是错误的。正确的做法应该是将两个图片路径分别存储到数组中,然后通过随机数来选择其中一个路径,再将其赋值给img元素的src属性。修改后的代码如下:
```
<div class="w">
<div id="slideshow">
<img src="../images/pop.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;">
<img src="../images/poc.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;">
</div>
<script>
function fun() {
var paths = ['../images/pop.gif', '../images/poc.gif'];
var randomIndex = Math.floor(Math.random() * paths.length);
$('img').attr('src', paths[randomIndex]);
}
</script>
</div>
```
这样就可以实现图片轮播的效果了。
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