function stAba(menu,conteudo){
	this.menu = menu;
	this.conteudo = conteudo;
}
var arAbas = new Array();
arAbas[0] = new stAba('tabPromo','conPromo');
arAbas[1] = new stAba('tabPromo1','conPromo1');
arAbas[2] = new stAba('tabPromo2','conPromo2');

function mostrarPromos(menu,conteudo){
	for (i=0;i<arAbas.length;i++){
		m = document.getElementById(arAbas[i].menu);
		m.className = 'desativada';
		c = document.getElementById(arAbas[i].conteudo)
		c.style.display = 'none';
	}
	m = document.getElementById(menu)
	m.className = 'ativada';
	c = document.getElementById(conteudo)
	c.style.display = 'block';
}