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;
   }
  }
  else{
   if(image.height>h){
    ImgD.height=h;
    ImgD.width=(image.width*h)/image.height;
   }else{
    ImgD.width=image.width;
    ImgD.height=image.height;
   }
  }
 }
}