(function(){var old=Fx.prototype.initialize;Fx.prototype.initialize=function(options){old.call(this,options);var trans=this.options.transition;if(typeof trans=='string'&&(trans=trans.split(':'))){var base=Fx.Transitions;base=base[trans[0]]||base[trans[0].capitalize()];if(trans[1])base=base['ease'+trans[1].capitalize()+(trans[2]?trans[2].capitalize():'')];this.options.transition=base;}};})();Fx.Transition=function(transition,params){params=$splat(params);return $extend(transition,{easeIn:function(pos){return transition(pos,params);},easeOut:function(pos){return 1-transition(1-pos,params);},easeInOut:function(pos){return(pos<=0.5)?transition(2*pos,params)/2:(2-transition(2*(1-pos),params))/2;}});};Fx.Transitions=new Hash({linear:$arguments(0)});Fx.Transitions.extend=function(transitions){for(var transition in transitions)Fx.Transitions[transition]=new Fx.Transition(transitions[transition]);};Fx.Transitions.extend({Pow:function(p,x){return Math.pow(p,x[0]||6);},Expo:function(p){return Math.pow(2,8*(p-1));},Circ:function(p){return 1-Math.sin(Math.acos(p));},Sine:function(p){return 1-Math.sin((1-p)*Math.PI/2);},Back:function(p,x){x=x[0]||1.618;return Math.pow(p,2)*((x+1)*p-x);},Bounce:function(p){var value;for(var a=0,b=1;1;a+=b,b/=2){if(p>=(7-4*a)/11){value=-Math.pow((11-6*a-11*p)/4,2)+b*b;break;}}
return value;},Elastic:function(p,x){return Math.pow(2,10*--p)*Math.cos(20*p*Math.PI*(x[0]||1)/3);}});['Quad','Cubic','Quart','Quint'].each(function(transition,i){Fx.Transitions[transition]=new Fx.Transition(function(p){return Math.pow(p,[i+2]);});});