if (is_win) {
	
	//include NS 4.x/win stylesheet
	if(is_nav4) {
		document.write('<link href="http://www.kcc.tju.edu/kcc/kccnew/includes/kcc_ns_4x.css" rel="stylesheet">');
		}
}
	//include mac stylesheet
else if (is_mac) {
		document.write('<link href="http://www.kcc.tju.edu/kcc/kccnew/includes/kcc_mac.css" rel="stylesheet">');
}