datepicker with input field
HTML
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css">
<input type="text" id="text" />
<div id="mydiv"></div>
JavaScript
$('#mydiv').datepicker();
$('#text').change(function(){
$('#mydiv').datepicker('setDate', $(this).val());
});
$('#mydiv').change(function(){
$('#text').attr('value',$(this).val());
});