function isObject(obj) {
	if (obj == null) {return false}
	if (typeof(obj) == 'object') { return true;	} else { return false; }
}
function mostraAbas()
{		
	c = document.getElementById("marcas");
	c.style.display = 'block';
	
	if(isObject(document.getElementById("menu_select"))) {
		document.getElementById("menu_select").style.visibility = "hidden";
	}
	
}
function escondeAbas()
{
	c = document.getElementById("marcas");
	c.style.display = 'none';
	if(isObject(document.getElementById("menu_select"))) {
		document.getElementById("menu_select").style.visibility = "visible";
	}
}
function mostraAuto()
{		
	c = document.getElementById("CorpoCentroR2_auto");
	c.style.display = 'block';
	
}
function escondeAuto()
{
	c = document.getElementById("CorpoCentroR2_auto");
	c.style.display = 'none';
	
}