var	ROLLOVER_BrowserOK = false;

var	ROLLOVER_BrowserName = navigator.appName;
var ROLLOVER_BrowserVersion = parseInt( navigator.appVersion );

if ( ( ROLLOVER_BrowserName == "Netscape" && ROLLOVER_BrowserVersion >= 3 ) ||
	( ROLLOVER_BrowserName == "Microsoft Internet Explorer" && ROLLOVER_BrowserVersion >= 3 ) )
{
	ROLLOVER_BrowserOK = true;
}

function ROLLOVER_Preload( strImageSource )
{
	var img;
	if ( ROLLOVER_BrowserOK )
	{
		img = new Image( );
		img.src = strImageSource;
	}
	return img;
}

function ROLLOVER_Change( strImageName, strPreloadedImageName )
{
	if ( ROLLOVER_BrowserOK )
	{
		document[ strImageName ].src = eval( strPreloadedImageName + ".src" );
	}
}