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;
			}
	}