function openSobre(){
	$('#modal-servico').fadeOut('fast');
	$('#modal-contato').fadeOut('fast');
	$('#modal-sobre').slideDown('fast');	
}
function openServico(){
	$('#modal-sobre').fadeOut('fast');
	$('#modal-contato').fadeOut('fast');
	$('#modal-servico').slideDown('fast');	
}
function openContato(){
	$('#modal-servico').fadeOut('fast');
	$('#modal-sobre').fadeOut('fast');
	$('#modal-contato').slideDown('fast');	
}