var string_var = navigator.userAgent;
var string_ver = navigator.appVersion;

if ((string_var.indexOf("Mac")) == (-1)) {
	if (document.all){
	document.write('<LINK REL="StyleSheet" HREF="../css/style_ie.css" type="text/css">');
	}else{
	document.write('<LINK REL="StyleSheet" HREF="../css/style_nn.css" type="text/css">');
	}
  }else{ 
    if (document.all){
		if ((string_ver.indexOf("4.5")) == (-1)) {
		document.write('<LINK REL="StyleSheet" HREF="../css/style_ie_mac.css" type="text/css">');
		}else{
		document.write('<LINK REL="StyleSheet" HREF="../css/style_ie45_mac.css" type="text/css">');
		}
	}else{
	document.write('<LINK REL="StyleSheet" HREF="../css/style_nn_mac.css" type="text/css">');
	}
}