jQuery API documentation - datepicker
The minimum selectable date. When set to
null, there is no minimum.
Multiple types supported:
Date: A date object containing the minimum date.
Number: A number of days from today. For example
two days from today and
String: A string in the format defined by the
dateFormat option, or a relative date.
Relative dates must contain value and period pairs; valid periods are
days. For example,
+1m +7d represents
one month and seven days from
In order not to display previous dates other than today