function showcart() {
  var link = document.getElementById("showcart_a");
  var div = document.getElementById("showcart_d");

  if (div.style.display == "none") {
    div.style.display = "inline";
    link.innerHTML = "Warenkorb ausblenden";
  } else {
    div.style.display = "none";
    link.innerHTML = "Warenkorb anzeigen";
  }

}