浏览器判断规则

		var sUserAgent = navigator.userAgent.toLowerCase();
		var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
		var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
		var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
		var bIsAndroid = sUserAgent.match(/android/i) == "android";
		var bIsQQ = sUserAgent.match(/qq/i) == "qq";
		var bIsWechat = sUserAgent.match(/micromessenger/i) == "micromessenger";
		var bIsWeibo = sUserAgent.match(/weibo/i) == "weibo";
		var bIsHuawei = sUserAgent.match(/huawei/i) == "huawei";