js scales images in equal proportions. This function is very practical. When a web page loads a relatively large image, it often deforms the web page and makes the page ugly. So we thought of using JS to control the image beyond a certain range. pictures to stabilize the page layout. This code snippet completes this function, and the code is very concise and the effect is very good.
<<a href="http://www.php1.cn/">html</a>> <head> <title>等比例缩放图片</title> <script> function DrawImage(ImgD,iwidth,iheight){ //参数(图片,允许的宽度,允许的高度) var image=new Image(); image.src=ImgD.src; if(image.width>0 && image.height>0){ if(image.width/image.height>= iwidth/iheight){ if(image.width>iwidth){ ImgD.width=iwidth; ImgD.height=(image.height*iwidth)/image.width; }else{ ImgD.width=image.width; ImgD.height=image.height; } }else{ if(image.height>iheight){ ImgD.height=iheight; ImgD.width=(image.width*iheight)/image.height; }else{ ImgD.width=image.width; ImgD.height=image.height; } } } } </script> </head> <body> <img src=http://up.2cto.com/2013/0803/20130803034531502.jpg" alt="自动缩放后的效果" width="100" height="100" onload="javascript:DrawImage(this,80,80)" /> </body> </html>