Today, someone gives me a lession:

What's the javascript?

<code javascript>
var popupDialog = $('<iframe src="" height="450" width="800" style="border:0;">');
//I get jQuery object, in this object, it doesn't include other plugin's method.


//After I introduce jquery.simplemodal-1.4.js, 
//It doesn't work. because  close() method is in simplemodal's object or jQuery's object.
popupDialog.close();    

</code>



<code javascript>
function() {
  var popupDialog;
  
  function closePopup(){
   window.parent.page.closeSelfSearchPopup();
  }

  
 return {
  closeSearchPopup : function() {
   closePopup();
  },

  closeSelfSearchPopup: function(){
   popupDialog.close();
  }
 }
}


//out page can not acess private variable: popupDialog directly. 
//so we need to use method to acess it: closeSelfSearchPopup();

//Since we create a new <iframe> then in the <iframe> we want to 
//call closeSearchPopup, so we have to go to parent page:
//window.parent.page.closeSelfSearchPopup();
</code>