JS控制图片显示的大小（图片等比例缩放）

来源：互联网发布：js删除数组中的对象编辑：程序博客网时间：2024/05/18 02:23

http://www.php-note.com/article/detail/397

<!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) {w = w * Ratio;h = 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>

0 0