var Popup = Class.create();
Popup.prototype = 
{
  initialize: function(options)
  {
    this.options = {
      url: '#',
      width: 500,
      height: 450
    }
    Object.extend(this.options, options || {});
    window.open(this.options.url, '', 'scrollbars=1,width='+this.options.width+',height='+this.options.height);
  }
}