ASP控制图片显示的大小（等比例缩放）

<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<script language="JavaScript">
<!--
var flag=false;
function DrawImage(ImgD){
 var image=new Image();
 image.src=ImgD.src;
 if(image.width>0 && image.height>0){
  flag=true;
  if(image.width/image.height>= 164/112){
   if(image.width>164){
    ImgD.width=164;
    ImgD.height=(image.height*164)/image.width;
   }else{
    ImgD.width=image.width;
    ImgD.height=image.height;
   }
   ImgD.alt=image.width+"x"+image.height;
  }
  else{
   if(image.height>112){
    ImgD.height=112;
    ImgD.width=(image.width*112)/image.height;
   }else{
    ImgD.width=image.width;
    ImgD.height=image.height;
   }
   ImgD.alt=image.width+"x"+image.height;
  }
 }
}
//-->
</script>
</HEAD>

<BODY>

<a href="./img.jpg" target="_blank"><img src="./img.jpg" border="0" width="164" height="112" onload="javascript:DrawImage(this);"></a>
</BODY>
</HTML>

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