function ativa_select(form)
{
	form.assessorias.disabled=true;
	form.bancos.disabled=true;
	if(form.tipo[2].checked==true)
		form.assessorias.disabled=false;
	else if(form.tipo[1].checked==true)
		form.bancos.disabled=false;
}
function verifica_radio_e_check(form)
{
	return (verifica_radios_assinalados(form) && verifica_checks_assinalados(form));
}
function verifica_radios_assinalados(form)
{
	if(form.radiobutton.checked==false)
		return false;
	return true;
}
function verifica_checks_assinalados(form)
{
	for(i=0;i<form.elements.length;i++)
		if(form.elements[i].type=='checkbox')
			if(form.elements[i].checked==true)
				return true;
	return false;
}