Data do formato da interface do usuário do jQuery
var date = $('#datepicker').datepicker({ dateFormat: 'dd-mm-yy' }).val();
WeboGet
var date = $('#datepicker').datepicker({ dateFormat: 'dd-mm-yy' }).val();1
$.datepicker.formatDate( "yy-mm-dd", new Date( 2007, 1 - 1, 26 ) );