繁體中文当前位置: 首页 > 图文教程 > 网络编程 > Javascript > js+css图片自动等比例缩小且垂直居中
- Javascript
- form中限制文本字节数js代码
- use jscript with List Proxy Server Information
- use jscript List Installed Software
- List Installed Software Features
- List Information About the Binary Files Used by an Application
- List the Codec Files on a Computer
- List the UTC Time on a Computer
- List Installed Hot Fixes
- excel操作之Add Data to a Spreadsheet Cell
- Add Formatted Data to a Spreadsheet
- Apply an AutoFormat to an Excel Spreadsheet
- JavaScript语法着色引擎（demo及打包文件下载）
- 类之Prototype.js学习
- 一款JavaScript压缩工具：X2JSCompactor
- iis6+javascript Add an Extension File
- jscript之Open an Excel Spreadsheet
- jscript之Read an Excel Spreadsheet
- jscript之List Excel Color Values
- 去除图像或链接黑眼圈的两种方法总结
- Add a Formatted Table to a Word Document
Javascript 中的 js+css图片自动等比例缩小且垂直居中
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-28 浏览: 303 ::
收藏到网摘: n/a
原文连接：http://www.ddcat.net/blog/archives/2007/10/188.html
图片自动等比例缩小，其实如果不考虑ie6的话，用css就可以实现，设定img的max-width和max-height，而<img>标签内不设定widht和height即可。
ie7已经支持max-width和max-height，这是为数不多的好消息之一。 但是对于ie6及以前的版本，就只能用js来设置了。
在 ff 2.0/ ie6 / ie7 中测试通过。 opera 8.5 cn 垂直居中未通过，正在研究[貌似opera下如果只有图片行高会失效……]。希望大家来测试。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>图片自动等比例缩小且垂直居中</title>
<!--[if lte IE 6]>
<script type="text/javascript" language="javascript">
function imgFix() {
//定义要限制的图片宽高,这个宽高要同style里面定义的相同，小于限定高宽的图片不操作
var widthRestriction = 200;
var heightRestriction = 200;
var allElements = document.getElementsByTagName('*')
for (var i = 0; i < allElements.length; i++)
{
if (allElements[i].className.indexOf('imgBox') >= 0)
{
var imgElements = allElements[i].getElementsByTagName('img');
for (var j=0; j < imgElements.length; j++)
{
if ( imgElements[j].width > widthRestriction || imgElements[j].height > heightRestriction )
{
if ( imgElements[j].width > imgElements[j].height)
{
imgElements[j].height = imgElements[j].height*(widthRestriction/imgElements[j].width);
imgElements[j].width = widthRestriction;
} else
{
imgElements[j].width = imgElements[j].width*(heightRestriction/imgElements[j].height);
imgElements[j].height = heightRestriction;
}
}
if ( imgElements[j].height < heightRestriction )
{
imgElements[j].style.paddingTop = ( heightRestriction -imgElements[j].height ) /2 + "px";
}
} /*for j*/
}
}/*for i*/
}
window.onload = imgFix;
</script>
<![endif]-->
<style type="text/css">
<!--
* {
margin:0;
padding:0;
}
.imgBox li {
list-style:none;
width:200px; /* 宽度 */
height:200px; /* 高度 */
background:#ccc;
border:1px solid #666;
text-align:center;
margin:5px;
line-height:200px;
}
.imgBox img {
max-width:200px; /* 宽度 */
max-height:200px; /* 高度 */
vertical-align:middle;
}
-->
</style>
</head>
<body>
<ul class="imgBox">
<li><img src="......" alt="img" /></li>
<li><img src="......" alt="img" /></li>
<li><img src="......" alt="img" /></li>
<li><img src="......" alt="img" /></li>
</ul>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>图片自动等比例缩小且垂直居中</title>
<!--[if lte IE 6]>
<script type="text/javascript" language="javascript">
function imgFix() {
//定义要限制的图片宽高,这个宽高要同style里面定义的相同，小于限定高宽的图片不操作
var widthRestriction = 200;
var heightRestriction = 200;
var allElements = document.getElementsByTagName('*')
for (var i = 0; i < allElements.length; i++)
{
if (allElements[i].className.indexOf('imgBox') >= 0)
{
var imgElements = allElements[i].getElementsByTagName('img');
for (var j=0; j < imgElements.length; j++)
{
if ( imgElements[j].width > widthRestriction || imgElements[j].height > heightRestriction )
{
if ( imgElements[j].width > imgElements[j].height)
{
imgElements[j].height = imgElements[j].height*(widthRestriction/imgElements[j].width);
imgElements[j].width = widthRestriction;
} else
{
imgElements[j].width = imgElements[j].width*(heightRestriction/imgElements[j].height);
imgElements[j].height = heightRestriction;
}
}
if ( imgElements[j].height < heightRestriction )
{
imgElements[j].style.paddingTop = ( heightRestriction -imgElements[j].height ) /2 + "px";
}
} /*for j*/
}
}/*for i*/
}
window.onload = imgFix;
</script>
<![endif]-->
<style type="text/css">
<!--
* {
margin:0;
padding:0;
}
.imgBox li {
list-style:none;
width:200px; /* 宽度 */
height:200px; /* 高度 */
background:#ccc;
border:1px solid #666;
text-align:center;
margin:5px;
line-height:200px;
}
.imgBox img {
max-width:200px; /* 宽度 */
max-height:200px; /* 高度 */
vertical-align:middle;
}
-->
</style>
</head>
<body>
<ul class="imgBox">
<li><img src="......" alt="img" /></li>
<li><img src="......" alt="img" /></li>
<li><img src="......" alt="img" /></li>
<li><img src="......" alt="img" /></li>
</ul>
</body>
</html>
评论 (0) All
