pure javascript version of jQuery's toggle. Now with show and hide! Yay!

toggle.js

HTMLElement.prototype.show = function(){
  this.style.display = '';
}

HTMLElement.prototype.hide = function(){
  this.style.display = 'none';
}

HTMLElement.prototype.toggle = function(){
  if (this.style.display == 'none'){
    this.show();
  } else {
    this.hide();
  }
}