var activeMenuItem = false;
	var activeTabIndex = 0;
	

	function showHide() {
		if(activeMenuItem){
			activeMenuItem.className = 'inactiveMenuItem'; 	
			var theId = activeMenuItem.id.replace(/[^0-9]/g,'');
		}

		activeMenuItem = this;		
		this.className = 'activeMenuItem';
		var theId = this.id.replace(/[^0-9]/g,'');
	}
	
	function initMenu() {
		var mainMenuObj = document.getElementById('mainMenu');
		var menuItems = mainMenuObj.getElementsByTagName('TR');
		
		for(var no=0; no<menuItems.length; no++){			
			menuItems[no].onclick = showHide;
			menuItems[no].id = 'mainMenuItem' + (no+1);

			if (no==activeTabIndex) {
				menuItems[no].className='activeMenuItem';
				activeMenuItem = menuItems[no];
			} else 
				menuItems[no].className='inactiveMenuItem';
		}		
	}