[JS]JS控制图片超过宽度自动缩小图片等比例缩放源代码实例
[JS]JS控制图片超过宽度自动缩小图片等比例缩放源代码实例
[JS]JS控制图片超过宽度自动缩小图片等比例缩放源代码实例
- 代码
- Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><!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=utf-8" />
- <title>最新javascript自动按比例显示图片,按比例压缩图片显示</title>
- <script type="text/javascript">
- function AutoResizeImage(maxWidth,maxHeight,objImg){
- var img = new Image();
- img.src = objImg.src;
- var hRatio;
- var wRatio;
- var Ratio = 1;
- var w = img.width;
- var h = img.height;
- wRatio = maxWidth / w;
- hRatio = maxHeight / h;
- if (maxWidth ==0 && maxHeight==0){
- Ratio = 1;
- }else if (maxWidth==0){//
- if (hRatio<1) Ratio = hRatio;
- }else if (maxHeight==0){
- if (wRatio<1) Ratio = wRatio;
- }else if (wRatio<1 || hRatio<1){
- Ratio = (wRatio<=hRatio?wRatio:hRatio);
- }
- if (Ratio<1){
- ww = w * Ratio;
- hh = h * Ratio;
- }
- objImg.height = h;
- objImg.width = w;
- }
- </script>
- </head>
- <body>
- <br />
- 原图显示(534 X 800)<br />
- onload="AutoResizeImage(0,0,this)<br />
- <a href="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" border="0" width="0" height="0" onload="AutoResizeImage(0,0,this)" alt="534 X 800"/></a><br/><br />
- 1.按宽度250压缩,不限制高度 按比例压缩<br />
- onload="AutoResizeImage(250,0,this)"<br />
- <a href="http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" border="0" width="0" height="0" onload="AutoResizeImage(250,0,this)" alt="250 X 374"/></a><br /><br />
- 2.按高度250压缩,不限制宽度 按比例压缩<br />
- onload="AutoResizeImage(0,250,this)"<br />
- <a href="http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" border="0" width="0" height="0" onload="AutoResizeImage(0,250,this)" alt="166 X 250"/></a><br /><br />
- 3.按高度250宽度250 按比例压缩<br />
- onload="AutoResizeImage(250,250,this)"<br />
- <a href="http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" border="0" width="0" height="0" onload="AutoResizeImage(250,250,this)" alt="200 X 300"/></a><br /><br />
- 4.高宽不等比例压缩 (400 X 512),此时高度不变,会自动按高度的比例压缩。<br />
- onload="AutoResizeImage(400,512,this)"<br />
- <a href="http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" border="0" width="0" height="0" onload="AutoResizeImage(400,512,this)" alt="341 X 512"/></a><br /><br />
- 5.高宽不等比例压缩 (300 X 600),此时宽度不变,会自动按宽度的比例压缩。<br />
- onload="AutoResizeImage(300,600,this)"<br />
- <a href="http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/421506/o_09925c7bcead8c60f683298dacf497a6.jpg" border="0" width="0" height="0" onload="AutoResizeImage(300,600,this)" alt="300 X 449"/></a><br /><br />
- 6.如果图片本来的高度和宽度小于压缩的最大高度和宽度,则不会拉大显示图片(按原图显示)<br />
- 原图444 x 207,压缩为 500 x 600,将保持原图显示<br />
- onload="AutoResizeImage(500,600,this)"<br />
- <a href="http://blog.csdn.net/feng_sundy/archive/2008/06/19/2566028.aspx" target="_blank"><img src="http://p.blog.csdn.net/images/p_blog_csdn_net/feng_sundy/242776/o_20070410_b7409cd284a0f799a357uePcEFa6ty0X.jpg" border="0" width="0" height="0" onload="AutoResizeImage(500,600,this)" alt="444 X 207"/></a><br /><br />
- </body>
- </html>
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