var test='1';
function downBtn()
 {
MM_preloadImages('../images/nav_about1.gif','../images/nav_team1.gif','../images/nav_focus1.gif','../images/nav_portfolio1.gif','../images/nav_contact1.gif','../images/nav_about2.gif','../images/nav_team2.gif','../images/nav_focus2.gif','../images/nav_portfolio2.gif','../images/nav_news2.gif')
  if (self.location.href.indexOf('/about_us/')!=-1)
     document.getElementById('about').src='../images/nav_about2.gif';
  else if (self.location.href.indexOf('/team/')!=-1)
     document.getElementById('team').src='../images/nav_team2.gif';
  else if (self.location.href.indexOf('/investment_focus/')!=-1)
     document.getElementById('focus').src='../images/nav_focus2.gif';
  else if (self.location.href.indexOf('/portfolio/')!=-1)
     document.getElementById('portfolio').src='../images/nav_portfolio2.gif';
  else if (self.location.href.indexOf('/news/')!=-1)
     document.getElementById('news').src='../images/nav_news2.gif';
  else
     alert('could not match the URL');
    }