var Browser =
{
    IE: !!document.all,
    IE6: document.all && !window.XMLHttpRequest,
    IE7: document.all && window.XMLHttpRequest && !document.querySelectorAll,
    IE8: document.all && window.XMLHttpRequest && document.querySelectorAll,
    IE7plus: document.all && window.XMLHttpRequest,
    Opera: !!window.opera,
    Chrome: window.MessageEvent && !document.getBoxObjectFor,
    Safari: !!window.openDatabase,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    FireFox: !!document.getBoxObjectFor,
    FireFox2: document.getBoxObjectFor && !document.documentElement.getBoundingClientRect,
    FireFox3: document.getBoxObjectFor && document.documentElement.getBoundingClientRect,
    FireFox3dot1: navigator.userAgent.indexOf('Shiretoko') > -1,
    Gecko: navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1, 
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
}