function setLeftNav() {
  var currentURL=window.location.href;
  var pageName;
  
  try {
    pageName = document.getElementById('headline').innerHTML;
  }
  catch(exception) {
    pageName = "";
  }
  
  // checks to see if page is in About Ross rection
  var regexp = /about_ross/;
  var returnval = regexp.test(currentURL);

  if (returnval == true) {
    show('smenu1');
    MM_swapImage('about_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);

    regexp = /community/;
    returnval = regexp.test(currentURL);

    if (returnval == true) {
      document.getElementById('smenu1-a').style.display='block';
      MM_swapImage('community_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
      
      if(pageName.indexOf('Life in Columbus') > 0) {
        document.getElementById('columbus_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
      else if(pageName.indexOf('Community Outreach') > 0) {
        document.getElementById('outreach_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
      else {
        document.getElementById('community_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
      return;
    }
    else {
      regexp = /career_center/;
      returnval = regexp.test(currentURL);
      
      if (returnval == true) {
            show('smenu5');
            MM_swapImage('about_arw','','/images/en-US/common/left_nav/arrow_right.gif',1);
            MM_swapImage('career_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
            document.getElementById('smenu5-a').style.display='block';

        if(pageName.indexOf('Competitive Benefits') > 0) {
          document.getElementById('competitive_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
       else if(pageName.indexOf('Diversity Initiatives') > 0) {
          document.getElementById('diversity_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else if(pageName.indexOf('Career Development') > 0) {
          document.getElementById('development_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else if(pageName.indexOf('Life Programs') > 0) {
          document.getElementById('work_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else {
          document.getElementById('career_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        return;
      }
      else
      {
        if(pageName.indexOf('Our History') > 0) {
          document.getElementById('history_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else if(pageName.indexOf('Our Vision') > 0) {
          document.getElementById('vision_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else {
         document.getElementById('about_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        return;
      }
    }
  }
  
  // checks to see if page is in Products section
  var regexp = /products/;
  var returnval = regexp.test(currentURL);

  if (returnval == true) {
    show('smenu6');
    MM_swapImage('products_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
    document.getElementById('products_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    
    return;
  }
  

  // checks to see if page is in Nutrition section
  regexp = /\/nutrition\//;
  returnval = regexp.test(currentURL);

  if (returnval == true) {
    show('smenu2');
    MM_swapImage('nutrition_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
    if(pageName.indexOf('Nutrition Innovation') > 0) {
      document.getElementById('nutrition_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
    else if(pageName.indexOf('From Our Experts') > 0) {
      document.getElementById('experts_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
	 else if(pageName.indexOf('Scientific Abstracts') > 0) {
      document.getElementById('science_abstracts').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
    else if(pageName.indexOf('Innovations') > 0) {
      document.getElementById('innovations_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
    else if(pageName.indexOf('The Science of Nutrition') > 0) {
      document.getElementById('science_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
    return;
  }

  // check to see if page is in News & Media section
  regexp = /news_and_media/;
  returnval = regexp.test(currentURL);

  if (returnval == true) {
    show('smenu3');
    MM_swapImage('news_and_media_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);

    regexp = /press_releases/;
    returnval = regexp.test(currentURL);
    if (returnval == true) {
      document.getElementById('smenu3-a').style.display='block';
      MM_swapImage('releases_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
      
      if(pageName.indexOf('2008 Press Releases') > 0 || currentURL.indexOf('year=2008') > 0) {
		document.getElementById('2008_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
	  }
      else if(pageName.indexOf('2007 Press Releases') > 0) {
        document.getElementById('2007_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
      else if(pageName.indexOf('2006 Press Releases') > 0) {
        document.getElementById('2006_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
      else if(pageName.indexOf('2005 Press Releases') > 0) {
        document.getElementById('2005_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
      else {
        document.getElementById('releases_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
      }
    }
    else {
      regexp = /media_center/;
      returnval = regexp.test(currentURL);
      if (returnval == true) {
        document.getElementById('smenu3-b').style.display='block';
        MM_swapImage('media_center_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
        
        if(pageName.indexOf('Press Kits') > 0) {
          document.getElementById('press_kits_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else if(pageName.indexOf('Media Resources') > 0) {
          document.getElementById('resources_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else if(pageName.indexOf('Media Contacts') > 0) {
          document.getElementById('contacts_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else {
          document.getElementById('media_center_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
      }
      else {
        if(pageName.indexOf('Awards and Recognition') > 0) {
          document.getElementById('awards_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else if(pageName.indexOf('New Products and Improvements') > 0) {
          document.getElementById('new_products_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
        else {
          document.getElementById('news_and_media_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
        }
      }
    }
    return;
  }
 
  // checks to see if page is in Ask an Expert section
  regexp = /ask_expert/;
  returnval = regexp.test(currentURL);

  if (returnval == true) {
    show('smenu4');
    MM_swapImage('ask_arw','','/images/en-US/common/left_nav/arrow_down.gif',1);
    if(pageName.indexOf('Ask a Product Expert') > 0) {
      document.getElementById('ask_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
    else{
      document.getElementById('faq_link').style.background = 'url(/images/en-US/common/left_nav/nav_gradient.jpg)';
    }
    return;
  }
}