function dirswitch(index) {
  if (index != parent.parent.head.dir_index) {
    parent.parent.head.dir_index = index;
    parent.parent.head.pic_index = 1;
    parent.dirs.location.href = "frame_dirs.htm";
    parent.link.location.href = "frame_link.htm";
    parent.pics.location.href = "frame_pics.htm";
  }
}

function picswitch(index) {
  if (index > 0) {
    parent.parent.head.pic_index = index;
    parent.dirs.location.href = "frame_dirs.htm";
    parent.pics.location.href = "frame_pics.htm";
  }
}

function infoswitch() {
  if (parent.parent.head.info_status == true) {
    parent.parent.head.info_status = false;
  } else {
    parent.parent.head.info_status = true;
  }
  parent.pics.location.href = "frame_pics.htm";
}

function showpic() {
  pic_win = window.open(dir_name + "/" + img_name + ".jpg", "picture", "top=100, left=100, width=400, height=300, dependent=yes, location=no, menubar=no, toolbar=no, status=no, resizable=yes, scrollbars=yes");
  pic_win = window.open(dir_name + "/" + img_name + ".jpg", "picture", "top=100, left=100, width=400, height=300, dependent=yes, location=no, menubar=no, toolbar=no, status=no, resizable=yes, scrollbars=yes");
  pic_win.document.title = "Veigl-Hütte :: " + img_title;
  pic_win.focus();
}

function sizepic(value) {
  if (value < 0 && parent.parent.head.pic_ratio <= -30) return;
  if (value > 0 && parent.parent.head.pic_ratio >=  30) return;
  parent.parent.head.pic_ratio = parent.parent.head.pic_ratio + value;
  parent.pics.location.href = "frame_pics.htm";
}