You can set datepicker options using "opts" setting:

$col["formatoptions"] = array("srcformat"=>'Y-m-d',"newformat"=>'d.m.Y', "opts" => array("changeYear" => false, "currentText"=> 'Start', "showButtonPanel"=> true ));

For complete list of datepicker options, refer this link: http://api.jqueryui.com/datepicker/

Thanks your early reply. I had one more question, can I make the now button to select the date time and exit the datepicker. Is there a smarty code for that. That would help me a lot and save me a lot of time.

Thanks in advance.

Hello,

You can search for datepicker documentation and help for such function.
Perhaps, you will need to write handler of onselect and call .hide() function in it.

http://api.jqueryui.com/datepicker/#option-onSelect
http://api.jqueryui.com/datepicker/#method-hide