//css select
var flag01="none";
var style01;
if (navigator.appName.charAt(0)=="M" && navigator.platform.charAt(0)=="M"){
    //MAC IE
    style01="css/m_ie_em";
	flag01="ok";
}else if(navigator.appName.charAt(0)=="M" && navigator.platform.charAt(0)=="W"){
	//WIN IE
	style01="css/w_ie_em";
	flag01="ok";
}else if(navigator.appName.charAt(0)=="N" && navigator.platform.charAt(0)=="M"){
	//MAC NN
	style01="css/m_nn_em";
	flag01="ok";
}else if(navigator.appName.charAt(0)=="N" && navigator.platform.charAt(0)=="W"){
	//WIN NN
	style01="css/w_nn_em";
	flag01="ok";
}else{
	//other
	end;
}
if(flag01!="none"){
	document.write('<link rel="StyleSheet" type="text/css" href="'+style01+'.css">');
}