var NavBarPopup = new function() {
  this.navcheck = null;
  this.navregister = null;
  this.navfound = null;
  this.navbuy = null;
  this.navsell = null;
  this.navabout = null;

  this.cleanup = function() {
    var self = NavBarPopup;
    self.navcheck = null;
    self.navregister = null;
    self.navfound = null;
    self.navbuy = null;
    self.navsell = null;
    self.navabout = null;
  };

  this.init = function() {
    var self = NavBarPopup;
    self.navcheck = document.getElementById('navcheck');
    self.navregister = document.getElementById('navregister');
    self.navfound = document.getElementById('navfound');
    self.navbuy = document.getElementById('navbuying');
    self.navsell = document.getElementById('navselling');
    self.navabout = document.getElementById('navabout');

    self.navcheck.onmouseover = function() { self.navcheck.childNodes[1].style.display = "block"; }
    self.navcheck.onmouseout  = function() { self.navcheck.childNodes[1].style.display = "none"; }
    self.navregister.onmouseover = function() { self.navregister.childNodes[1].style.display = "block"; }
    self.navregister.onmouseout  = function() { self.navregister.childNodes[1].style.display = "none"; }
    self.navfound.onmouseover = function() { self.navfound.childNodes[1].style.display = "block"; }
    self.navfound.onmouseout  = function() { self.navfound.childNodes[1].style.display = "none"; }
    self.navbuy.onmouseover = function() { self.navbuy.childNodes[1].style.display = "block"; }
    self.navbuy.onmouseout  = function() { self.navbuy.childNodes[1].style.display = "none"; }
    self.navsell.onmouseover = function() { self.navsell.childNodes[1].style.display = "block"; }
    self.navsell.onmouseout  = function() { self.navsell.childNodes[1].style.display = "none"; }
    self.navabout.onmouseover = function() { self.navabout.childNodes[1].style.display = "block"; }
    self.navabout.onmouseout  = function() { self.navabout.childNodes[1].style.display = "none"; }
  };
};

window.onunload = NavBarPopup.cleanup;
window.onload = NavBarPopup.init;