var menucode = "";
var temp = "";

function toggleMenu() {
  temp = document.getElementById('menuwrapper').innerHTML; 
  if (temp != '') {  
    menucode = temp;
    document.getElementById('menuwrapper').innerHTML = ''; 
    document.getElementById('showmenulink').innerHTML =  'Show menu   |   '
  }
  else {
    document.getElementById('menuwrapper').innerHTML = menucode ;
    document.getElementById('showmenulink').innerHTML = 'Hide menu   |   '
  }
  return false;
}