图片的自动缩放（js收藏)

1. <script language="JavaScript" type="text/javascript"> <!-- // 说明：用 JavaScript 实现网页图片等比例缩放 function DrawImage(ImgD,maxwidth,maxheight){ var image=new Image(); image.src=ImgD.src; if(image.width>0 && image.height>0){ if(image.width/image.height>= maxwidth/maxheight){ if(image.width> maxwidth){ ImgD.width= maxwidth; ImgD.height=(image.height* maxwidth)/image.width; }else{ ImgD.width=image.width; ImgD.height=image.height; } } else{ if(image.height> maxheight){ ImgD.height= maxheight; ImgD.width=(image.width* maxheight)/image.height; }else{ ImgD.width=image.width; ImgD.height=image.height; } } } } //--> </script>