function addEvent(obj, evType, fn)
{
	if (typeof obj == "string")
	{
		if (null == (obj = $(obj) ) )
		{
			throw new Error("Cannot add event listener: HTML Element not found.");
		}
	}
	if (obj.attachEvent)
	{
		return obj.attachEvent(("on" + evType), fn);
	}
	else if (obj.addEventListener)
	{
		return obj.addEventListener(evType, fn, true);
	}
	else
	{
		throw new Error("Your browser doesn't support event listeners.");
	}
}	

function iniciar()
{   
	var menu = document.getElementById('menu');
	menu = menu.getElementsByTagName("a");
	var menuVideo = document.getElementById('menuvideo');
	menuVideo = menuVideo.getElementsByTagName("a")
	onoff( menu, 1 );
	onoff( menuVideo, 2 );
	
}
function onoff( allItems, indiceAtual )
{
	var itemAtual = [];
	
	for (var i = 0; i < allItems.length; i++)
	{
		//Item Atual
		if( allItems[i].className == 'on' )
			itemAtual[indiceAtual] = allItems[i];
			
		allItems[i].onclick = function()
		{
			for (var i = 0; i < allItems.length; i++)
			{        
				allItems[i].className = 'off';            
			}
			
			this.className = 'on';
			itemAtual[indiceAtual] = this;
		}
		
		allItems[i].onmouseover = function()
		{    
			for (var i = 0; i < allItems.length; i++)
			{        
				allItems[i].className = 'off';            
			}
			
			this.className = 'on';                
		}
		
		allItems[i].onmouseout = function()
		{    
			for (var i = 0; i < allItems.length; i++)
			{        
				allItems[i].className = 'off';            
			}
			
			itemAtual[indiceAtual].className = 'on';
		}

	} 
}

addEvent(window, "load", iniciar);