if (is_ie4up) 
	{
	// Check to see if it is IE 4 or IE 5
	document.writeln("<link rel='stylesheet' type='text/css' href='/styles/bas.css'>");
	}
else if (is_nav4up || is_opera) 
	{                                             
	// Check to see if browser is NS or Opera
	document.writeln("<link rel='stylesheet' type='text/css' href='/styles/bas_ns.css'>");
	}
else 
	{
	// Do nothing in older browsers 
	}