the code form the document.
echo theme('jquery_countdown', array(
'since' => date("F d, Y g:i a", mktime(0,0,0,0,0,2009)),
'format' => 'YOWDHMS',
'description' => t('Since New Year'),
when i put this code in the story, and change the mktime(0,0,0,10,20,2013)set the input type to php,but it can't work, why.