datepicker image trigger dont works with options

datepicker image trigger dont works with options


When I use
$("#datepicker").datepicker({showOn: 'button', buttonImage: 'images/
calendar.gif', buttonImageOnly: true});
It works so fine.
But when I use
$("#datepicker").datepicker('option',
{
showOn: 'button', buttonImage: 'images/calendar.gif',
buttonImageOnly: true,
minDate: 0,
dateFormat: "DD, d 'de' MM 'de' yy",
altField: '#alternate', altFormat: "dd mm yy"
});
all the options works good, EXEPT the 'showOn: 'button', buttonImage:
'imagens/calendar.gif', buttonImageOnly: true'.
Can somebody helps me?