var userAgent = navigator.userAgent.toLowerCase();

/*os detection*/
jQuery.os = {
    mac: /mac/.test(userAgent),
    win: /win/.test(userAgent),
    linux: /linux/.test(userAgent)
};

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