if(typeof(AC) == "undefined") {
	AC={};
}

AC.Detector = {
	getAgent:function() {
		return navigator.userAgent.toLowerCase();
	},

	isMac:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/mac/i);
	},

	isWin:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/win/i);
	},

	isWin2k:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return this.isWin(agent)&&(agent.match(/nt\s*5/i));
	},

	isWinVista:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return this.isWin(agent)&&(agent.match(/nt\s*6/i));
	},


	isWebKit:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/AppleWebKit/i);
	},
	
	isOpera:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/opera/i);
	},
	
	isIE:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/msie/i);
	},
	
	isIEStrict:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/msie/i)&&!this.isOpera(agent);
	},
	
	isFirefox:function(userAgent) {
		var agent=userAgent||this.getAgent();
		return agent.match(/firefox/i);
	},

	isQTInstalled:function() {
		var qtInstalled=false;
		
		if(navigator.plugins&&navigator.plugins.length) {
			for(var i=0;i<navigator.plugins.length;i++) {
				var plugin=navigator.plugins[i];
				
				if(plugin.name.indexOf("QuickTime") > -1) {
					qtInstalled=true;
				}
			}
		}
		else {
			qtObj=false;
			execScript('on error resume next: qtObj = IsObject(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1"))','VBScript');
			qtInstalled=qtObj;
		}
	
		return qtInstalled;
	},

	getQTVersion:function() {
		var version="0";
		
		if(navigator.plugins&&navigator.plugins.length) {
			for(var i=0;i<navigator.plugins.length;i++) {
				var plugin=navigator.plugins[i];
				var match=plugin.name.match(/quicktime\D*([\.\d]*)/i);
				if(match&&match[1]) {
					version=match[1];
				}
			}
		}
		else {
			ieQTVersion=null;
			execScript('on error resume next: ieQTVersion = (Hex(CreateObject("QuickTimeCheckObject.QuickTimeCheck.1").QuickTimeVersion)/1000000)','VBScript');
		
			if(ieQTVersion) {
				version=(ieQTVersion+"").split(/\./)[0];
			}
		}
		
		return version;
	},

	isQTCompatible:function(required,actual) {
		function areCompatible(required,actual) {
			var requiredValue=parseInt(required[0])
			if(isNaN(requiredValue)) {
				requiredValue=0;
			}
			var actualValue=parseInt(actual[0])
			if(isNaN(actualValue)) {
				actualValue=0;
			}
	
			if(requiredValue==actualValue) {
				if(required.length>1) {
					return areCompatible(required.slice(1),actual.slice(1));
				}
				else {
					return true;
				}
			} 
			else if(requiredValue<actualValue) {
				return true;
			}
			else {
				return false;
			}
		}

		var expectedVersion=required.split(/\./);
		var actualVersion=actual?actual.split(/\./):this.getQTVersion().split(/\./);
		
		return areCompatible(expectedVersion,actualVersion);
	},

	isValidQTAvailable:function(required) {
		return this.isQTInstalled()&&this.isQTCompatible(required)
	}
};