function DrawImage(ImgD,ImgW,ImgH)
{
  var image=new Image();
  image.src=ImgD.src;
  if(image.width>0 && image.height>0)
  {
    if(image.width/image.height>=ImgW/ImgH)
    {
      if(image.width>ImgW)
      {
        ImgD.width=ImgW;
        ImgD.height=(image.height*ImgW)/image.width;
      }
      else
      {
        ImgD.width=image.width;
        ImgD.height=image.height;
      }
    }
    else
    {
      if(image.height>ImgH)
      {
        ImgD.height=ImgH;
        ImgD.width=(image.width*ImgH)/image.height;
      }
      else
      {
        ImgD.width=image.width;
        ImgD.height=image.height;
      }
    }
    ImgD.alt=image.width+"กม"+image.height;
  }
}