function navigate(url) {
  var loc = {
    "tour.html"       :'/gigs/list',
    "'home.html'"     :'/site/home',
    "'tour.html'"     :'/gigs/list',
    "'publicity.html'":'/presses/list',
    "'biography.html'":'/site/biography',
    "'contact.html'"  :'/site/contact',
    "'presskit.html'" :'/site/presskit'
  };
  new Ajax.Updater('content', loc[url], {asynchronous:true, evalScripts:true });        
}