// JavaScript Document

var flag=false; 
function DrawImage(ImgD,W,H){ 
 var image=new Image(); 
 image.src=ImgD.src; 
 if(image.width>0 && image.height>0){ 
  flag=true; 
  if(image.width/image.height>= W/H){ 
   if(image.width>W){
    ImgD.width=W; 
    ImgD.height=(image.height*W)/image.width; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看详细信息..."; 
  } 
  else{ 
   if(image.height>H){
    ImgD.height=H; 
    ImgD.width=(image.width*H)/image.height; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看详细信息..."; 
  } 
 }
}