图片等比例缩放.txt 图片等比例缩放.txt

<script   language="JavaScript">     
  <!--     
  //图片按比例缩放     
  var   flag=false;     
  function   DrawImage(ImgD){     
    var   image=new   Image();     
    var   iwidth   =   80;     //定义允许图片宽度     
    var   iheight   =   80;     //定义允许图片高度     
    image.src=ImgD.src;     
    if(image.width>0   &&   image.height>0){     
    flag=true;     
    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;     
      }     
      ImgD.alt=image.width+"×"+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;     
      }     
      ImgD.alt=image.width+"×"+image.height;