jQuery: problem with dialog

i'm having 2 dialogs in my web - when setting their property autoOpen:true they both show. but when setting autoOpen:false (and open them manually) - only one dialog opens :( with 开发者_如何学JAVAthe other one, nothing happens at all (no error in firebug). any idea what it could be? it can't be the dialog content, as i defined just some simple debug text.

div.dialog({ 
   autoOpen:false, 
   bgiframe: false, 
   resizable: true, 
   width:wi, 
   minHeight:0, 
   height:he, 
   modal: true, 
   title: div.attr("caption"), 
   overlay: { backgroundColor: '#ffffff', opacity: 0.8 } 
});

div is probably not the right identifier for jQuery.

Change div.dialog(...) to $("#mydialog").dialog(...)

where the div containing the dialog is:

<div id="mydialog">put dialog content here.</div>