function hide(id) {
  if (document.getElementById){
    obj = document.getElementById(id);
    if (obj.style.display == ""){
      obj.style.display = "none";
	                       }}} 

function show(id) {
  if (document.getElementById){
    obj = document.getElementById(id);
    if (obj.style.display == "none"){
      obj.style.display = "";
	          }}}