arMenu = new Array();

				arMenu[0] = new Array("m0",
				"sm00"
				);

				arMenu[1] = new Array("m1",
				"sm10"
				);

				function expandMenu(mn)
				{
				// hide all submenus
				for(var i = 0; i < arMenu.length; i++)
				{
				    
					for(var j = 1; j < arMenu[i].length; j++)
					{
					document.getElementById(arMenu[i][j]).style.display = "none";
					}
				}

					if(mn >= 0) //only do if showing a sub-menu
					{
						// show the requested menus submenu's
						for(var k = 1; k < arMenu[mn].length; k++)
						{
							document.getElementById(arMenu[mn][k]).style.display = "block";
						}
					}
				}