(function(){

var document = this.document;
var window = document.window = this;

var ua = navigator.userAgent.toLowerCase(),
	platform = navigator.platform.toLowerCase(),
	UA = ua.match(/(opera|ie|trident|firefox|chrome|version)[\s\/:]([\w\d\.]+)?.*?(safari|version[\s\/:]([\w\d\.]+)|rv:(\d.?)|$)/) || [null, 'unknown', 0],
	mode = (UA[1] == 'ie' || UA[1] == 'trident') && document.documentMode;

var Browser = this.Browser = {

	extend: Function.prototype.extend,

	name: (UA[1] == 'version') ? UA[3] : (UA[1] == 'trident' ? 'ie' : UA[1]),

	version: mode || parseFloat((UA[1] == 'opera' && UA[4]) ? UA[4] : ((UA[1] == 'trident' && UA[5]) ? UA[5] : UA[2])),

	Platform: {
		name: ua.match(/ip(?:ad|od|hone)/) ? 'ios' : (ua.match(/(?:webos|android)/) || platform.match(/mac|win|linux/) || ['other'])[0]
	},

	Features: {
		xpath: !!(document.evaluate),
		air: !!(window.runtime),
		query: !!(document.querySelector),
		json: !!(window.JSON)
	},

	Plugins: {}

};

Browser[Browser.name] = true;
Browser[Browser.name + parseInt(Browser.version, 10)] = true;
Browser.Platform[Browser.Platform.name] = true;

// Request

Browser.Request = (function(){

	var XMLHTTP = function(){
		return new XMLHttpRequest();
	};

	var MSXML2 = function(){
		return new ActiveXObject('MSXML2.XMLHTTP');
	};

	var MSXML = function(){
		return new ActiveXObject('Microsoft.XMLHTTP');
	};

	return Function.attempt(function(){
		XMLHTTP();
		return XMLHTTP;
	}, function(){
		MSXML2();
		return MSXML2;
	}, function(){
		MSXML();
		return MSXML;
	});

})();

Browser.Features.xhr = !!(Browser.Request);

//<1.4compat>

// Flash detection

var version = (Function.attempt(function(){
	return navigator.plugins['Shockwave Flash'].description;
}, function(){
	return new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
}) || '0 r0').match(/\d+/g);

Browser.Plugins.Flash = {
	version: Number(version[0] || '0.' + version[1]) || 0,
	build: Number(version[2]) || 0
};

//</1.4compat>

// String scripts

Browser.exec = function(text){
	if (!text) return text;
	if (window.execScript){
		window.execScript(text);
	} else {
		var script = document.createElement('script');
		script.setAttribute('type', 'text/javascript');
		script.text = text;
		document.head.appendChild(script);
		document.head.removeChild(script);
	}
	return text;
};


if (Browser.Platform.ios) Browser.Platform.ipod = true;

Browser.Engine = {};

var setEngine = function(name, version){
	Browser.Engine.name = name;
	Browser.Engine[name + version] = true;
	Browser.Engine.version = version;
};

if (Browser.ie){
	Browser.Engine.trident = true;

	switch (Browser.version){
		case 6: setEngine('trident', 4); break;
		case 7: setEngine('trident', 5); break;
		case 8: setEngine('trident', 6);
	}
}

if (Browser.firefox){
	Browser.Engine.gecko = true;

	if (Browser.version >= 3) setEngine('gecko', 19);
	else setEngine('gecko', 18);
}

if (Browser.safari || Browser.chrome){
	Browser.Engine.webkit = true;

	switch (Browser.version){
		case 2: setEngine('webkit', 419); break;
		case 3: setEngine('webkit', 420); break;
		case 4: setEngine('webkit', 525);
	}
}

if (Browser.opera){
	Browser.Engine.presto = true;

	if (Browser.version >= 9.6) setEngine('presto', 960);
	else if (Browser.version >= 9.5) setEngine('presto', 950);
	else setEngine('presto', 925);
}

if (Browser.name == 'unknown'){
	switch ((ua.match(/(?:webkit|khtml|gecko)/) || [])[0]){
		case 'webkit':
		case 'khtml':
			Browser.Engine.webkit = true;
		break;
		case 'gecko':
			Browser.Engine.gecko = true;
	}
}

this.$exec = Browser.exec;

//</1.2compat>

})();
