function catch_fh_sizes() {
   fh_width = document.getElementById("fh_spot").offsetWidth + 30;
   document.getElementById("fh_spot").style.width = fh_width+"px";

   fh_x = document.getElementById("fh_spot_cont").offsetLeft;
   fh_abzug = document.getElementById("fh_spot_button").offsetWidth;
   fh_left = fh_x + fh_abzug - fh_width - 2;
   document.getElementById("fh_spot_cont").style.left = fh_left+"px";
}

function fh_in() {

  fh_height = 255;
  document.getElementById("fh_spot_cont").style.height = fh_height+"px";

}

function fh_out() {

  fh_height = 0;
  document.getElementById("fh_spot_cont").style.height = fh_height+"px";

}