var amount = 0;
  function TISup() {
  if (amount>0){
  amount = amount-5;
  document.getElementById('TOP-INFO-wrapper').style.height = amount+'px';
  setTimeout("TISup()",0);
  }
  document.getElementById('TISswitchTab').innerHTML = "information";
  }
  
  function TISdown() {
  if (amount<100){
  amount = amount+5;
  document.getElementById('TOP-INFO-wrapper').style.height = amount+'px';
  setTimeout("TISdown()",0);
  }
  document.getElementById('TISswitchTab').innerHTML = "hide information";
  }
  
  function TISswitch() {
  if (amount==100) { TISup(); } 
  if (amount==0) { TISdown(); }
  }