function activaCapa (capa)
{
	obj=document.getElementById(capa);
	obj.style.visibility='visible';
	
	obj=document.getElementById('simbolCopy');
	obj.style.visibility='hidden';
}

function desactivaCapa (capa)
{
	obj=document.getElementById(capa);
	obj.style.visibility='hidden';
	
	obj=document.getElementById('simbolCopy');
	obj.style.visibility='visible';
}