//to disable some dates
function disallowDate(date)
{
	today = new Date();
	today.setDate(today.getDate()-1);
	if ( today < date ) // if date is older than today
		return false;
	return true;
}

function dateSelected(calendar, date)
{
	today = new Date();
	today.setDate(today.getDate()-1);
	if ( today < date ) // if date is older than today
	{
		var input_field = document.getElementById("date");
		input_field.value = date;
	}
	else
		alert("Selecione uma data maior que a data atual!");
};