// JavaScript Document
<!-- 
/*
代码说明：图片代码自动缩放
熊建平
2011-5-26

*/
var flag=false; 
function DrawImage(ImgD,sw,sh){ 
var image=new Image(); 
image.src=ImgD.src; 
if(image.width>0 && image.height>0){ 
  flag=true; 
  if(image.width/image.height>=sw/sh){ 
   if(image.width>sw){
    ImgD.width=sw; 
    ImgD.height=(image.height*sw)/image.width; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   /*ImgD.alt="bigpic"  */
  } 
  else{ 
   if(image.height>sh){
    ImgD.height=sh; 
    ImgD.width=(image.width*sh)/image.height; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
    /*ImgD.alt="bigpic"  */ 
  } 
}
}

<!--
////图片按比例缩放
//var flag=false;
//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){
//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;
//}
//}
//} 
//-->
//-->