//ativa menu selecionada
function ativaMenu(menu)
{
	 //tira seleção de todas as abas
	 document.getElementById('menu1').className='';
	 document.getElementById('menu2').className='';
	 document.getElementById('menu3').className='';
	 document.getElementById('menu4').className='';
	 document.getElementById('menu5').className='';
	 document.getElementById('menu6').className='';
	 document.getElementById('menu7').className='';
	 document.getElementById('menu8').className='';
	 document.getElementById('menu9').className='';
	 
	 //seleciona aba selecionada
	 document.getElementById(menu).className='active';
}