// JavaScript Document

var hrefToImgId; 
var filename;

function setDefaultHighlight () {
  hrefToImgId = new Object;
  hrefToImgId['home'] = 'home';
  hrefToImgId['info'] = 'info';
  hrefToImgId['media'] = 'media';
  hrefToImgId['order'] = 'order';
  hrefToImgId['resources'] = 'resources';
  hrefToImgId['tour'] = 'tour';
  hrefToImgId['contact'] = 'contact';

  var href = location.href;

  href = href.replace(/http:\/\//, '');
 
  // Strip trailing / from URL if it's the last character
  if (href[href.length - 1] == '/' && href.indexOf('/') != href.length - 1) {
    href = href.replace( /\/$/, "");  
  }

  filename = href.substring(href.lastIndexOf('/') + 1);

  if (filename == '') {
    filename = 'home';
  }
 
  var img = document.getElementById(hrefToImgId[filename]);
  img.src = "images/button" + hrefToImgId[filename] + "on.png";
} // setDefaultHighlight

function swapImage (imgId, newImage) {  
  if (imgId != hrefToImgId[filename]) {
    var img = document.getElementById(imgId);
    img.src = newImage;
  }
}