function element_by_id(id) {
 var element;
 if(document.getElementById)
  element = document.getElementById(id);
 else
  element = document.all[id];
 return element;
};

function isIE() {
 return /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent);
}

function visual_history() {
 if (!isIE()) {
  title = element_by_id('title');
  if (title) {
   title.innerHTML = 
    '<div onmouseover="__visual_history_over()" onmouseout="__visual_history_over()">' +
    '<a href="#" onclick="history.back();return false;" id="back">&lt;</a> ' + 
    // '<a href="#" id="middle">' + title.innerHTML + '</a>' +
    title.innerHTML +
    // ' <a href="#" onclick="history.forward()" id="forward">&gt;</a>' + 
    '</div>';
  }
 }
}

function __visual_history_over() {
 back = element_by_id('back');
 // forward = element_by_id('forward');

 if (back.style.visibility == 'visible') {
  back.style.visibility = 'hidden';
  // forward.style.visibility = 'hidden';
 } else {
  back.style.visibility = 'visible';
  // forward.style.visibility = 'visible';
 }
}