var agt=navigator.userAgent.toLowerCase();
var is_major = parseInt(navigator.appVersion);
var is_minor = parseFloat(navigator.appVersion);
var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
var isMac = navigator.userAgent.indexOf("Mac") != -1;
var isNs = navigator.appName.indexOf("Netscape")!= -1;
var is_nav6 = (is_nav && (is_major == 5));
var is_nav4up = (is_nav && (is_major >= 4));


if (is_nav6 && isMac) 
{
    document.write("<link rel='stylesheet' type='text/css' href='css/pc_style.css'>")
    
} 
else if(is_nav4up && isMac)
{
    document.write("<link rel='stylesheet' type='text/css' href='css/pc_style.css'>")	
}
else
{
    document.write("<link rel='stylesheet' type='text/css' href='css/pc_style.css'>")
}