//Copyright 2008 ATLASDW, All rights reserved.
//REQUERIDO por SCRIPTS de Transition.JS

function transicion(curva,ms,callback){ 
    this.ant=0.01; 
    this.done_=false; 
    var _this=this; 
    this.start=new Date().getTime(); 
    this.init=function(){ 
        setTimeout(function(){ 
                if(!_this.next()){ 
                    callback(1); 
                    _this.done_=true; 
                    window.globalIntervalo=0; 
                    return; 
                } 
                callback(_this.next()); 
                _this.init(); 
            },13); 
    } 
    this.next=function(){ 
        var now=new Date().getTime(); 
        if((now-this.start)>ms) 
            return false; 
        return this.ant=curva((now-this.start+.001)/ms,this.ant); 
    } 
} 

function fx(obj,inicio,fin,propCss,u,curva,ms,cola){ 
    if(!window.globalIntervalo) 
        window.globalIntervalo=1; 
    else { 
        if(cola) 
            return setTimeout(function(){fx(obj,inicio,fin,propCss,u,curva,ms,cola);},30); 
        else 
            return; 
    }     
    var t=new transicion(curva,ms,function(p){ 
        if(fin<inicio){ 
            var delta=inicio-fin; 
            obj.style[propCss]=(inicio-(p*delta))+u; 
        } 
        else{ 
            var delta=fin-inicio; 
            obj.style[propCss]=(inicio+(p*delta))+u; 
        } 
    }); 
    t.init(); 
    t=null; 
}
function senoidal(p,ant){ 
    return (1 - Math.cos(p * Math.PI)) / 2; 
}