Default value datepicker not showing

Default value datepicker not showing

I have the following datepicker function where I would like the DefaultDate to be displayed when opening the page. However  selectDefaultDate: true does not work. The date is used as a filter so when another date is selected the selected dat should show and persist in the view. 
How can I get it to display the default date on opening of the page?
A second question I have is how to set the DefaultDate to the dirst day of the current year: 01/01/YY ?

  1. jQuery(function() {
  2. jQuery( "#hour_datefrom" ).datepicker({
  3. dateFormat: 'dd/mm/yy',
  4. showOn: "button",
  5. buttonImage: "<?=JAVASCRIPT_PATH?>/javascript/jquery/jquery-ui/images/calendar.gif",
  6. buttonImageOnly: true,
  7. changeMonth: true,
  8. defaultDate: '01/02/2013',
  9. selectDefaultDate: true,
  10. onSelect: function(selected) {
  11.  jQuery("#hour_dateto").datepicker("option","minDate", selected),
  12.  jQuery( "#hour_datefrom" ).datepicker('option', 'setDate', selected);},
  13. onClose: function(){ jQuery( "#hour_datefrom" ).focus();}
  14. }).click(function() { jQuery(this).datepicker('show'); });
  15. });

html:
  1. <input type="text" name="hour_datefrom" id="hour_datefrom" class="validate[required] "
  2. value="<?=$this->setExtraPara['hour_datefrom']?>" />