var usr_agent = navigator.userAgent.toLowerCase();

var agn_win = (usr_agent.indexOf('win') != -1);
var agn_mac = (usr_agent.indexOf('mac') != -1);

var br_version = parseInt(navigator.appVersion);

var ie = (usr_agent.indexOf('msie') != -1);
var ns = ((usr_agent.indexOf('mozilla') != -1) && (usr_agent.indexOf('compatible') == -1));
var ns2 = (ns && (br_version >= 5));


var Mylev="";
if (n == 1){
	Mylev = "../";
}else if(n == -1){
	Mylev = "/";
}else if(n == 0){
	Mylev = "./";
}


if(agn_win){
 if(ie){
    document.write('<link rel="stylesheet" href="' + Mylev + 'css/style1.css" type="text/css">');
	}
 else if(ns2){
    document.write('<link rel="stylesheet" href="' + Mylev + 'css/style1.css" type="text/css">');
	}
 else if(ns){
    document.write('<link rel="stylesheet" href="' + Mylev + 'css/style2.css" type="text/css">');
	}
}
else if(agn_mac){
 if(ie){
    document.write('<link rel="stylesheet" href="' + Mylev + 'css/style1.css" type="text/css">');
	}
 else if(ns2){
    document.write('<link rel="stylesheet" href="' + Mylev + 'css/style1.css" type="text/css">');
	}
 else if(ns){
    document.write('<link rel="stylesheet" href="' + Mylev + 'css/style1.css" type="text/css">');
	}
}