function isBrowserMouseOverEnabled() {
var bwr = navigator.appName;
var ver = parseInt(navigator.appVersion);

if ( ( (bwr == "Netscape") || (bwr == "Microsoft Internet Explorer") ) && ( ver > 3 ) )
{
return true;
}
else
{
return false;
}
}

function swapImage(imageObj, imageSRC)
{
if (isBrowserMouseOverEnabled())
{
if (imageObj)
{
imageObj.src = imageSRC;
}
}
}