//Detects browser version; necessary for changeorig script below;

function xbDetectBrowser()
{
  var oldOnError = window.onerror;
  var element = null;

  window.onerror = null;
  
  // work around bug in xpcdom Mozilla 0.9.1
  window.saveNavigator = window.navigator;

  navigator.OS    = '';
  navigator.version  = parseFloat(navigator.appVersion);
  navigator.org    = '';
  navigator.family  = '';
  var i = 0;
  var ua = window.navigator.userAgent.toLowerCase();
  
 
 if ((i = ua.indexOf('msie')) != -1)
  {
    navigator.org    = 'microsoft';
    navigator.version  = parseFloat('0' + ua.substr(i+5), 10);
    
    if (navigator.version < 4)
      navigator.family = 'ie3';
    else
      navigator.family = 'ie4'
  }
  else if (ua.indexOf('gecko') != -1)
  {
    navigator.family = 'gecko';
    var rvStart = navigator.userAgent.indexOf('rv:') + 3;
    var rvEnd = navigator.userAgent.indexOf(')', rvStart);
    var rv = navigator.userAgent.substring(rvStart, rvEnd);
    var decIndex = rv.indexOf('.');
    if (decIndex != -1)
    {
      rv = rv.replace(/\./g, '')
      rv = rv.substring(0, decIndex-1) + '.' + rv.substr(decIndex)
    }
    navigator.version = parseFloat(rv);

    if (ua.indexOf('netscape') != -1)
      navigator.org = 'netscape';
    else if (ua.indexOf('compuserve') != -1)
      navigator.org = 'compuserve';
    else
      navigator.org = 'mozilla';
  }
  else if ((ua.indexOf('mozilla') !=-1) && (ua.indexOf('spoofer')==-1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('opera')==-1)&& (ua.indexOf('webtv')==-1) && (ua.indexOf('hotjava')==-1))
  {
    var is_major = parseFloat(navigator.appVersion);
    
    if (is_major < 4)
      navigator.version = is_major;
    else
    {
      i = ua.lastIndexOf('/')
      navigator.version = parseFloat('0' + ua.substr(i+1), 10);
    }
    navigator.org = 'netscape';
    navigator.family = 'nn' + parseInt(navigator.appVersion);
  }
  
  window.onerror = oldOnError;
}

xbDetectBrowser();

//Changes image source for rollovers
//Takes two arguments, image name and new image source, e.g. changeorig('imagename','images/image2.gif')
function changeorig(image_name, location) {
	if ((navigator.family=='ie4') || (navigator.family=='nn4') || (navigator.family=='gecko')) {
	document.images[image_name].src = location;
	}
}