[frundik]

Решено:

new Element('a').setProperties({id: 'lbAddphoto', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = function() {
     			jQuery.ajax({  
                    type: "POST",  
                    url: "addtempphoto.php",  
                    data: "np="+myimg+"&pp="+myimgpath,  
                    success: function(){  
                        jQuery("#content").html(html);  
                    }
					  
                });
		   };