//Detect browser version 
var userAgent = navigator.userAgent.toLowerCase();
// Figure out what browser is being used 
var browser = {
    version: (userAgent.match(/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/) || [])[1],
    safari: /webkit/.test(userAgent),
    opera: /opera/.test(userAgent),
    msie: /msie/.test(userAgent) && !/opera/.test(userAgent),
    mozilla: /mozilla/.test(userAgent) && !/(compatible|webkit)/.test(userAgent)
};

//Detect OS
var winTest = navigator.platform.indexOf("Win");
var macTest = navigator.platform.indexOf("Mac");

if (browser.safari) {
    document.write('<link href="/Common/SafariStyles.css" type="text/css" rel="stylesheet" />');
}

if (browser.mozilla && (macTest > -1)) {
    document.write('<link href="/Common/FXMac.css" type="text/css" rel="stylesheet" />');
}

if (browser.msie && browser.version == "7.0") {
    document.write('<link href="/Common/IE7Styles.css" type="text/css" rel="stylesheet" />');
}

if (browser.msie && browser.version == "6.0") {
    document.write('<link href="/Common/IE6Styles.css" type="text/css" rel="stylesheet" />');
}