var JSTweener = {
	looping: false,
	frameRate: 60,
	objects: [],
	defaultOptions:{
		time:1,
		transition: 'easeNone',
		delay:0,
		prefix:{},
		suffix:{},
		onStart:undefined,
		onStartParams:undefined,
		onUpdate:undefined,
		onUpdateParams:undefined,
		onComplete:undefined,
		onCompleteParams:undefined
	},
	inited:false,
	easingFunctionsLowerCase:{},
	init:function(){
		this.inited = true;
		for(var key in JSTweener.easingFunctions){
			this.easingFunctionsLowerCase[key.toLowerCase()] = JSTweener.easingFunctions[key];
		}
	},
	toNumber:function(value, prefix, suffix){
		if(!suffix) suffix = 'px';
		return value.toString().match(/[0-9]/) ? Number(value.toString().replace(new RegExp(suffix + '$'), '').replace(new RegExp('^' + (prefix ? prefix : '')), '')) : 0;
	},
	addTween:function(obj, options){
		var self = this;
		if(!this.inited){this.init();}
		var o = {};
		o.target = obj;
		o.targetPropeties = {};
		for(var key in this.defaultOptions){
			if(typeof options[key] != 'undefined'){
				o[key] = options[key];
				delete options[key];
			}else{
				o[key] = this.defaultOptions[key];
			}
		}
		if(typeof o.transition == 'function'){
			o.easing = o.transition;
		}else{
			o.easing = this.easingFunctionsLowerCase[o.transition.toLowerCase()];
		}
		for(var key in options){
			if(!o.prefix[key]) o.prefix[key] = '';
			if(!o.suffix[key]) o.suffix[key] = '';
			var sB = this.toNumber(obj[key], o.prefix[key], o.suffix[key]);
			o.targetPropeties[key] = {
				b: sB,
				c: options[key] - sB
			};
		}
		window.setTimeout(function(){
			o.startTime = (new Date() - 0);
			o.endTime = o.time * 1000 + o.startTime;
			if(typeof o.onStart == 'function'){
				if(o.onStartParams){
					o.onStart.apply(o, o.onStartParams);
				}else{
					o.onStart();
				}
			}
			self.objects.push(o);
			if(!self.looping){
				self.looping = true;
				self.eventLoop.call(self);
			}
		},
		o.delay * 1000);
	},
	eventLoop:function(){
		var now = (new Date() - 0);
		for(var i = 0; i < this.objects.length; i++){
			var o = this.objects[i];
			var t = now - o.startTime;
			var d = o.endTime - o.startTime;
			if(t >= d){
				for(var property in o.targetPropeties){
					var tP = o.targetPropeties[property];
					try {
						o.target[property] = o.prefix[property] + (tP.b + tP.c) + o.suffix[property];
					} catch(e){}
				}
				this.objects.splice(i, 1);
				if(typeof o.onUpdate == 'function'){
					if(o.onUpdateParams){
						o.onUpdate.apply(o, o.onUpdateParams);
					}else{
						o.onUpdate();
					}
				}
				if(typeof o.onComplete == 'function'){
					if(o.onCompleteParams){
						o.onComplete.apply(o, o.onCompleteParams);
					}else{
						o.onComplete();
					}
				}
			}else{
				for(var property in o.targetPropeties){
					var tP = o.targetPropeties[property];
					var val = o.easing(t, tP.b, tP.c, d);
					try {
						o.target[property] = o.prefix[property] + val + o.suffix[property];
					} catch(e){}
				}
				if(typeof o.onUpdate == 'function'){
					if(o.onUpdateParams){
						o.onUpdate.apply(o, o.onUpdateParams);
					}else{
						o.onUpdate();
					}
				}
			}
		}
		if(this.objects.length > 0){
			var self = this;
			setTimeout(function(){
				self.eventLoop()
			},
			1000 / self.frameRate);
		}else{
			this.looping = false;
		}
	}
};
JSTweener.easingFunctions = {
	easeNone:function(t, b, c, d){
		return c * t / d + b;
	},
	easeInQuad:function(t, b, c, d){
		return c * (t /= d) * t + b;
	},
	easeOutQuad:function(t, b, c, d){
		return -c * (t /= d) * (t - 2) + b;
	},
	easeInOutQuad:function(t, b, c, d){
		if((t /= d / 2) < 1) return c / 2 * t * t + b;
		return -c / 2 * ((--t) * (t - 2) - 1) + b;
	},
	easeInCubic:function(t, b, c, d){
		return c * (t /= d) * t * t + b;
	},
	easeOutCubic:function(t, b, c, d){
		return c * ((t = t / d - 1) * t * t + 1) + b;
	},
	easeInOutCubic:function(t, b, c, d){
		if((t /= d / 2) < 1) return c / 2 * t * t * t + b;
		return c / 2 * ((t -= 2) * t * t + 2) + b;
	},
	easeOutInCubic:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutCubic(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInCubic((t * 2) - d, b + c / 2, c / 2, d);
	},
	easeInQuart:function(t, b, c, d){
		return c * (t /= d) * t * t * t + b;
	},
	easeOutQuart:function(t, b, c, d){
		return -c * ((t = t / d - 1) * t * t * t - 1) + b;
	},
	easeInOutQuart:function(t, b, c, d){
		if((t /= d / 2) < 1) return c / 2 * t * t * t * t + b;
		return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
	},
	easeOutInQuart:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutQuart(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInQuart((t * 2) - d, b + c / 2, c / 2, d);
	},
	easeInQuint:function(t, b, c, d){
		return c * (t /= d) * t * t * t * t + b;
	},
	easeOutQuint:function(t, b, c, d){
		return c * ((t = t / d - 1) * t * t * t * t + 1) + b;
	},
	easeInOutQuint:function(t, b, c, d){
		if((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
		return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
	},
	easeOutInQuint:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutQuint(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInQuint((t * 2) - d, b + c / 2, c / 2, d);
	},
	easeInSine:function(t, b, c, d){
		return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
	},
	easeOutSine:function(t, b, c, d){
		return c * Math.sin(t / d * (Math.PI / 2)) + b;
	},
	easeInOutSine:function(t, b, c, d){
		return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
	},
	easeOutInSine:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutSine(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInSine((t * 2) - d, b + c / 2, c / 2, d);
	},
	easeInExpo:function(t, b, c, d){
		return (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b - c * 0.001;
	},
	easeOutExpo:function(t, b, c, d){
		return (t == d) ? b + c : c * 1.001 * (-Math.pow(2, -10 * t / d) + 1) + b;
	},
	easeInOutExpo:function(t, b, c, d){
		if(t == 0) return b;
		if(t == d) return b + c;
		if((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b - c * 0.0005;
		return c / 2 * 1.0005 * (-Math.pow(2, -10 * --t) + 2) + b;
	},
	easeOutInExpo:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutExpo(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInExpo((t * 2) - d, b + c / 2, c / 2, d);
	},
	easeInCirc:function(t, b, c, d){
		return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
	},
	easeOutCirc:function(t, b, c, d){
		return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
	},
	easeInOutCirc:function(t, b, c, d){
		if((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
		return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
	},
	easeOutInCirc:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutCirc(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInCirc((t * 2) - d, b + c / 2, c / 2, d);
	},
	easeInElastic:function(t, b, c, d, a, p){
		var s;
		if(t == 0) return b;
		if((t /= d) == 1) return b + c;
		if(!p) p = d * .3;
		if(!a || a < Math.abs(c)){
			a = c;
			s = p / 4;
		} else s = p / (2 * Math.PI) * Math.asin(c / a);
		return - (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
	},
	easeOutElastic:function(t, b, c, d, a, p){
		var s;
		if(t == 0) return b;
		if((t /= d) == 1) return b + c;
		if(!p) p = d * .3;
		if(!a || a < Math.abs(c)){
			a = c;
			s = p / 4;
		} else s = p / (2 * Math.PI) * Math.asin(c / a);
		return (a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b);
	},
	easeInOutElastic:function(t, b, c, d, a, p){
		var s;
		if(t == 0) return b;
		if((t /= d / 2) == 2) return b + c;
		if(!p) p = d * (.3 * 1.5);
		if(!a || a < Math.abs(c)){
			a = c;
			s = p / 4;
		} else s = p / (2 * Math.PI) * Math.asin(c / a);
		if(t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
		return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b;
	},
	easeOutInElastic:function(t, b, c, d, a, p){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutElastic(t * 2, b, c / 2, d, a, p);
		return JSTweener.easingFunctions.easeInElastic((t * 2) - d, b + c / 2, c / 2, d, a, p);
	},
	easeInBack:function(t, b, c, d, s){
		if(s == undefined) s = 1.70158;
		return c * (t /= d) * t * ((s + 1) * t - s) + b;
	},
	easeOutBack:function(t, b, c, d, s){
		if(s == undefined) s = 1.70158;
		return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
	},
	easeInOutBack:function(t, b, c, d, s){
		if(s == undefined) s = 1.70158;
		if((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
		return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
	},
	easeOutInBack:function(t, b, c, d, s){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutBack(t * 2, b, c / 2, d, s);
		return JSTweener.easingFunctions.easeInBack((t * 2) - d, b + c / 2, c / 2, d, s);
	},
	easeInBounce:function(t, b, c, d){
		return c - JSTweener.easingFunctions.easeOutBounce(d - t, 0, c, d) + b;
	},
	easeOutBounce:function(t, b, c, d){
		if((t /= d) < (1 / 2.75)){
			return c * (7.5625 * t * t) + b;
		} else if(t < (2 / 2.75)){
			return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b;
		} else if(t < (2.5 / 2.75)){
			return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b;
		}else{
			return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
		}
	},
	easeInOutBounce:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeInBounce(t * 2, 0, c, d) * .5 + b;
		else return JSTweener.easingFunctions.easeOutBounce(t * 2 - d, 0, c, d) * .5 + c * .5 + b;
	},
	easeOutInBounce:function(t, b, c, d){
		if(t < d / 2) return JSTweener.easingFunctions.easeOutBounce(t * 2, b, c / 2, d);
		return JSTweener.easingFunctions.easeInBounce((t * 2) - d, b + c / 2, c / 2, d);
	}
};