var Popup = Class.create();
Popup.prototype = 
{
  initialize: function(options)
  {
    this.options = {
      url: '#',
      width: 300,
      height: 300
    }
    Object.extend(this.options, options || {});
    window.open(this.options.url, '', 'width='+this.options.width+',height='+this.options.height);
  }
}

function jumpto(s) 
{
  var gourl = s.options[s.selectedIndex].value;

  if ((gourl != null) && (gourl != "") )
  {
    window.top.location.href = gourl;
  }
}