function changeDisplay(id){
  var elem = document.getElementById(id);
  elem.style.display = elem.style.display == "none" ? "block" : "none";}

function Tbridge(id){
     document.getElementById(id).style.fontWeight="bold";
     document.getElementById(id).style.backgroundColor="#eedd66";}

function Tback(id){
     document.getElementById(id).style.fontWeight="normal";
     document.getElementById(id).style.backgroundColor="transparent";}


function Ibridge(id){
     document.getElementById(id).style.border="2px solid #ee5555";}

function Iback(id){
     document.getElementById(id).style.border="2px solid transparent";}