var window_factory = function (container, options) {  
     var window_header = new Element('div',{  
         className: 'window_header'  
     });  
     var window_title = new Element('div',{  
         className: 'window_title'  
     });  
     var window_close = new Element('div',{  
         className: 'window_close'  
     });  
     var window_contents = new Element('div',{  
         className: 'window_contents'  
     });  
     var w = new Control.Modal(container, Object.extend({  
         className: 'window',  
         closeOnClick: window_close,  
         draggable: window_header,  
         insertRemoteContentAt: window_contents,  
         afterOpen: function(){  
             window_title.update(container.readAttribute('title'))  
         }  
     }, options || {}));  
     w.container.insert(window_header);  
     window_header.insert(window_title);  
     window_header.insert(window_close);  
     w.container.insert(window_contents);  
     return w;  
 };