SO - 18525789

HTML

<label for="from">From</label>
<input type="text" id="from" name="from" />
<br/>
<label for="to">to</label>
<input type="text" id="to" name="to" />

JavaScript

$(function () {
    var dateFormat = 'dd.mm.yy';

    $("#from").datepicker({
        maxDate: '0',
        dateFormat: dateFormat,
        onSelect: function (selectedDate) {
            var date = $.datepicker.parseDate(dateFormat, selectedDate)
            var tod = date.setDate(date.getDate());
            $to.prop('disabled', false).datepicker( "option", "minDate", new Date(tod ));
        }
    });
    var $to = $("#to").datepicker({
        dateFormat: dateFormat
    }).prop('disabled', true);
});