Click on the 'open overlay' button below to see the overlay display. To hide the overlay, click anywhere within it.

open overlay 
 var overlay = new Overlay(document.body,{
 
                           id: 'overlay',

                           color: '#393',

                           duration: 300,

                           opacity: 0.4,

                           onClick: function() {

                                this.close();
                           } 
               });

               $('openoverlay').addEvent('click',function() {

                     overlay.open();  
               });