制作一个简单的JavaScript图片库

Question

I'm trying to make a very simple Image gallery. 我正在尝试制作一个非常简单的图片库。 Most of the design is already complete (used JQuery)...but now I'm trying to think out the logic it takes to get the images to change. 大多数设计已经完成（使用了JQuery）...但是现在，我正在尝试思考更改图像所需的逻辑。 For this part I was thinking I would just use javaScript instead of Jquery just to keep it simple. 对于这一部分，我认为我只是使用javaScript而不是Jquery来保持简单。 I'm not too familiar with the javaScript syntax but this is my attempt to get started. 我不太熟悉javaScript语法，但这是我的入门尝试。 Is this a feasible way to create an image gallery? 这是创建图片库的可行方法吗？ I know making the images the background isn't a great idea, but for testing purposes I don't feel like cropping images -- so setting the image as the background trims the images to fit. 我知道使图像成为背景不是一个好主意，但是出于测试目的，我不希望裁剪图像-因此将图像设置为背景会修剪图像以使其适合。

I was also trying to think about how to set the ImageCnt to zero initially... Can an onload function be used to set the ImageCnt to 0 when the page loads? 我还试图考虑如何最初将ImageCnt设置为零...页面加载时可以使用onload函数将ImageCnt设置为0吗？ Can a var be passed into next()? 可以将var传递给next（）吗？ If so, I could pass the current ImageCnt from the onClick to the function. 如果是这样，我可以将当前的ImageCnt从onClick传递给该函数。

PS. PS。 I've omitted a lot of code to keep it simple to read, but I can provide more if it's necessary. 我省略了很多代码以使其易于阅读，但是如果有必要，我可以提供更多代码。

Thanks! 谢谢！ here's my code: 这是我的代码：

Javascript Java脚本

<script>
  function next()
  {
    var myImage= new Array(); 
    myImage[0]="penguins.jpg";       
    myImage[1]="desert.jpg";
    myImage[2]="jellyfish.jpg";
    myImage[3]="flower.jpg"; 

    ImageCnt++;

    document.getElementById("whiteBox").style.background = 'url(myImage[ImageCnt])';
  }
</script>

html html

<a href="#" onclick="next()"><img src="next.png"/></a>

Answer 1

Most importantly, you need to build the background property by concatenating ("+" operator) its different parts, as shown below ; 最重要的是，您需要通过串联（“ +”运算符）其不同部分来构建背景属性，如下所示； otherwise it won't be replaced by the values from your array if you make it a static string. 否则，如果将其设为静态字符串，则不会被数组中的值替换。

Also use the global scope to declare and initialize your image array and counter : 还可以使用全局范围来声明和初始化图像数组和计数器：

<script>
var myImage= new Array(); 
myImage[0]="penguins.jpg";       
myImage[1]="desert.jpg";
myImage[2]="jellyfish.jpg";
myImage[3]="flower.jpg"; 

var ImageCnt = 0;

function next(){
    ImageCnt++;
    document.getElementById("whiteBox").style.background = 'url(' + myImage[ImageCnt] + ')';
  }
</script>

Finally, return false from onclick otherwise you'll reload the page : 最后，从onclick返回false，否则您将重新加载页面：

<a href="#" onclick="next();return false;"><img src="next.png"/></a>

Answer 2

This is the best example of a simple inline non-jQuery image gallery that I've found, obtained from http://extremestudio.ro/ : 这是从http://extremestudio.ro/获得的一个简单的内联非jQuery图像画廊的最佳示例：

<!DOCTYPE html PUBLIC>
<html>
  <head>
    <title>
      Simple and Effective Photo Gallery with HTML and JavaScript
    </title>

    <style type="text/css">
      body {
        background: #222;
        margin-top: 20px;
      }

      h3 {
        color: #eee;
        font-family: Verdana;
      }

      .thumbnails img {
        height: 80px;
        border: 4px solid #555;
        padding: 1px;
        margin: 0 10px 10px 0;
      }

      .thumbnails img:hover {
        border: 4px solid #00ccff;
        cursor:pointer;
      }

      .preview img {
        border: 4px solid #444;
        padding: 1px;
        width: 400px;
      }
    </style>
  </head>

  <body>
    <div class="gallery" align="center">
      <h3>Simple and Effective Photo Gallery with HTML and JavaScript</h3><br/>

      <div class="thumbnails">
        <img onmouseover="preview.src=img1.src" id="img1" src="http://bit.ly/2rz3hy" alt="Image Not Loaded"/>
        <img onmouseover="preview.src=img2.src" id="img2" src="http://bit.ly/1ug1e6" alt="Image Not Loaded"/>
        <img onmouseover="preview.src=img3.src" id="img3" src="http://bit.ly/1yIAYc" alt="Image Not Loaded"/>
        <img onmouseover="preview.src=img4.src" id="img4" src="http://bit.ly/2LHyDW" alt="Image Not Loaded"/>
        <img onmouseover="preview.src=img5.src" id="img5" src="http://bit.ly/2wyHSR" alt="Image Not Loaded"/>
        <img onmouseover="preview.src=img6.src" id="img6" src="http://bit.ly/yRo1i" alt="Image Not Loaded"/>
      </div><br/>

      <div class="preview" align="center">
        <img id="preview" src="http://bit.ly/2rz3hy" alt="No Image Loaded"/>
      </div><br/>
    </div>
  </body>
</html>

The only javascript is embedded in the tags, but could easily be moved to script tags for more flexibility. 唯一的javascript嵌入在标签中，但可以轻松移动到脚本标签以提高灵活性。

制作一个简单的JavaScript图片库

问题描述

Javascript Java脚本

html html

2 个解决方案

解决方案1
3 已采纳 2013-01-13 02:04:35

解决方案2
2 2014-02-24 00:32:52

制作一个简单的JavaScript图片库

问题描述

Javascript Java脚本

html html

2 个解决方案

解决方案1 3 已采纳 2013-01-13 02:04:35

解决方案2 2 2014-02-24 00:32:52

解决方案1
3 已采纳 2013-01-13 02:04:35

解决方案2
2 2014-02-24 00:32:52