      1 xq.Browser = {
      2 	// By Layout Engines
      3 	isTrident: navigator.appName == "Microsoft Internet Explorer",
      4 	isWebkit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
      5 	isGecko: navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
      6 	isKHTML: navigator.userAgent.indexOf('KHTML') != -1,
      7 	isPresto: navigator.appName == "Opera",
      8
      9 	// By Platforms
     10 	isMac: navigator.userAgent.indexOf("Macintosh") != -1,
     11 	isUbuntu: navigator.userAgent.indexOf('Ubuntu') != -1,
     12
     13 	// By Browsers
     14 	isIE: navigator.appName == "Microsoft Internet Explorer",
     15 	isIE6: navigator.userAgent.indexOf('MSIE 6') != -1,
     16 	isIE7: navigator.userAgent.indexOf('MSIE 7') != -1
     17 };