var drop_down = function()
		{

			this.create = function(div)
			{

				var menu = document.getElementById(div);

				var menu_items = menu.getElementsByTagName("li");

				for(var i = 0; i < menu_items.length; i++)
				{

					var item = menu_items[i];

					item.submenu = item.getElementsByTagName("ul");

					if(item.submenu.length > 0)
					{

						item.onmouseover = function()
						{

							this.submenu[0].style.display = 'block';

							var link = this.getElementsByTagName("a");

							if(link[0].className == 'selected')
							{

								this.selected = true;

							}

							link[0].className = 'selected';

						}

						item.onmouseout = function()
						{

							this.submenu[0].style.display = 'none';

							var link = this.getElementsByTagName("a");

							if(this.selected)
							{

								link[0].className = 'selected';

							} else {

								link[0].className = null;

							}

						}

					}

				}

			}

		}

    function initMenu(){
      var menu = new drop_down();

      menu.create("main-menu");
    }
		////////////////////////////////////////////////////////////////////////////////


  window.onload = initMenu;