// preload icon nav bar images
var imgArray = new Array();

imgArray['home_on']      = new Image();
imgArray['home_on'].src  = "/images2/nav/icon_home_on.gif"; 
imgArray['home_off']     = new Image();
imgArray['home_off'].src = "/images2/nav/icon_home_off.gif";

imgArray['trade_on']      = new Image();
imgArray['trade_on'].src  = "/images2/nav/icon_trade_on.gif"; 
imgArray['trade_off']     = new Image();
imgArray['trade_off'].src = "/images2/nav/icon_trade_off.gif";

imgArray['links_on']      = new Image();
imgArray['links_on'].src  = "/images2/nav/icon_links_on.gif"; 
imgArray['links_off']     = new Image();
imgArray['links_off'].src = "/images2/nav/icon_links_gray.gif";

imgArray['news_on']      = new Image();
imgArray['news_on'].src  = "/images2/nav/icon_news_on.gif"; 
imgArray['news_off']     = new Image();
imgArray['news_off'].src = "/images2/nav/icon_news_off.gif";

imgArray['rss_on']      = new Image();
imgArray['rss_on'].src  = "/images2/nav/icon_rss_on.gif"; 
imgArray['rss_off']     = new Image();
imgArray['rss_off'].src = "/images2/nav/icon_rss_gray.gif";

imgArray['web_on']      = new Image();
imgArray['web_on'].src  = "/images2/nav/icon_web_on.gif"; 
imgArray['web_off']     = new Image();
imgArray['web_off'].src = "/images2/nav/icon_web_off.gif";

function icon_on(icon) {
  
  img = document.getElementById('b_' + icon);

  img.src = imgArray[icon + '_on'].src;

  }

function icon_off(icon) {

  img = document.getElementById('b_' + icon);

  img.src = imgArray[icon + '_off'].src;
  }


/***
function icon_on(icon) {
  img = document.getElementById('b_' + icon);

  img.src = '/images2/nav/icon_' + icon + '_on.gif';
  }

function icon_off(icon) {
  img = document.getElementById('b_' + icon);

  img.src = '/images2/nav/icon_' + icon + '_off.gif';
  }
***/