// script zum vergrößern und verkleinern von css boxen 

function show_a() {
  var gross = document.getElementById("block_1a");
  gross.style.height = "auto";

  var link = document.getElementById("link_1a");
  link.style.display = "none";

  var linkb = document.getElementById("link_1b");
  linkb.style.display = "inline"; // inline / block / list-item / none
  }

function close_a() {
  var gross = document.getElementById("block_1a");
  gross.style.height = "20px";

  var link = document.getElementById("link_1a");
  link.style.display = "inline";

  var linkb = document.getElementById("link_1b");
  linkb.style.display = "none";
  }

function show_b() {
  var gross = document.getElementById("block_1b");
  gross.style.height = "auto";

  var link = document.getElementById("link_2a");
  link.style.display = "none";

  var linkb = document.getElementById("link_2b");
  linkb.style.display = "inline";
  }

function close_b() {
  var gross = document.getElementById("block_1b");
  gross.style.height = "126px";

  var link = document.getElementById("link_2a");
  link.style.display = "inline";

  var linkb = document.getElementById("link_2b");
  linkb.style.display = "none";
  }

function show_c() {
  var gross = document.getElementById("block_1c");
  gross.style.height = "auto";

  var link = document.getElementById("link_3a");
  link.style.display = "none";

  var linkb = document.getElementById("link_3b");
  linkb.style.display = "inline";
  }

function close_c() {
  var gross = document.getElementById("block_1c");
  gross.style.height = "126px";

  var link = document.getElementById("link_3a");
  link.style.display = "inline";

  var linkb = document.getElementById("link_3b");
  linkb.style.display = "none";
  }

function show_d() {
  var gross = document.getElementById("block_1d");
  gross.style.height = "auto";
  }