browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == 'Netscape' && browser_version < 2.0)
        { roll = 'false'; }
else if (browser_name == 'Netscape' && browser_version == 2.0)
        { roll = 'false'; }
else if (browser_name == 'Netscape' && browser_version >= 3.0)
        { roll = 'true'; }
else if (browser_name == 'Microsoft Internet Explorer' && browser_version <= 2.0)
        { roll = 'false'; }
else if (browser_name == 'Microsoft Internet Explorer' && browser_version >= 3.0)
        { roll = 'true'; }
else
        { roll = 'false'; }

function msover(img,ref)
{
  if (roll == 'true')
    { document.images[img].src = ref; }
}

function msout(img,ref)
{
  if (roll == 'true')
    { document.images[img].src = ref; }
}

function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}