var flg = 0;

function blink_img(src, width, height, border) {
  if (flg == 0) {
    imghtml = "<img src = \"" + src + "\" ";
    imghtml += "width = \"" + width + "\" ";
    imghtml += "height = \"" + height + "\" ";
    imghtml += "border = \"" + border + "\">";
    flg = 1;
  }
  else {
    imghtml = "";
    flg = 0;
  }

  return imghtml;
}