jquery/fx/fx.js

function fx(el,op,ty,tz){
	var z = this;
	z.a = function(){z.el.style[ty]=z.now+z.o.unit};
	z.max = function(){return z.el["io"+ty]||z.el["natural"+tz]||z.el["scroll"+tz]||z.cur()};
	z.cur = function(){return parseInt($.getCSS(z.el,ty))};
	z.show = function(){z.ss("block");z.custom(0,z.max())};
	z.hide = function(){z.el.$o=$.getCSS(z.el,"overflow");z.el["io"+ty]=this.cur();z.custom(z.cur(),0)};
	z.ss = function(a){if(y.display!=a)y.display=a};
	z.toggle = function(){if(z.cur()>0)z.hide();else z.show()};
	z.modify = function(a){z.custom(z.cur(),z.cur()+a)};
	z.clear = function(){clearInterval(z.timer);z.timer=null};
	z.el = el.constructor==String?document.getElementById(el):el;
	var y = z.el.style;
        z.oo = y.overflow;
	y.overflow = "hidden";
	z.o = {
          unit: "px",
          duration: (op && op.duration) || 400,
          onComplete: (op && op.onComplete) || op
        };
	z.step = function(f,tt){
		var t = (new Date).getTime();
		var p = (t - z.s) / z.o.duration;
		if (t >= z.o.duration+z.s) {
			z.now = tt;
			z.clear();
			setTimeout(function(){
				y.overflow = z.oo;
				if(y.height=="0px"||y.width=="0px")z.ss("none");
				$.setAuto( z.el, "height" );
				$.setAuto( z.el, "width" );
				if(z.o.onComplete.constructor == Function){z.el.$_ = z.o.onComplete;z.el.$_();}
			},13);
		} else
			z.now = ((-Math.cos(p*Math.PI)/2) + 0.5) * (tt-f) + f;
		z.a();
	};
	z.custom = function(f,t){
		if(z.timer)return;this.now=f;z.a();z.io=z.cur();z.s=(new Date).getTime();
		z.timer=setInterval(function(){z.step(f,t);}, 13);
	};
}
fx.fn = ["show","hide","toggle"];
fx.ty = ["Height","Width","Left","Top"];
for(var i in fx.ty){(function(){
	var c = fx.ty[i];
	fx[c] = function(a,b){
		return new fx(a,b,c.toLowerCase(),c);};
})()}
fx.Opacity = function(a,b){
	var o = new fx(a,b,"opacity");
	o.cur = function(){return parseFloat(o.el.style.opacity);};
	o.a = function() {
		var e = o.el.style;
		if (o.now == 1) o.now = 0.9999;
		if (window.ActiveXObject)
			e.filter = "alpha(opacity=" + o.now*100 + ")";
		e.opacity = o.now;
	};
	o.io = o.now = 1;
	o.a();
	return o;
};
fx.Resize = function(e,o){
	var z = this;
	var h = new fx.Height(e,o);
	if(o) o.onComplete = null;
	var w = new fx.Width(e,o);
	function c(a,b,c){return (!a||a==c||b==c);}
	for(var i in fx.fn){(function(){
		var j = fx.fn[i];
		z[j] = function(a,b){
			if(c(a,b,"height")) h[j]();
			if(c(a,b,"width")) w[j]();
		};
	})()}
	z.modify = function(c,d){
		h.modify(c);
		w.modify(d);
	};
};
fx.FadeSize = function(e,o){
	var z = this;
	var p = new fx.Opacity(e,o);
	if(o) o.onComplete = null;
	var r = new fx.Resize(e,o);
	for(var i in fx.fn){(function(){
		var j = fx.fn[i];
		z[j] = function(a,b){p[j]();r[j](a,b);};
	})()}
};

$.speed = function(s,o) {
  if ( o && o.constructor == Function ) o = { onComplete: o };
  o = o || {};
  var ss = {"crawl":1200,"xslow":850,"slow":600,"medium":400,"fast":200,"xfast":75,"normal":400};
  o.duration = typeof s == "number" ? s : ss[s] || 400;
  return o;
};

$.fn.hide = function(a,o) {
  o = $.speed(a,o);
  return a ? this.each(function(){
    new fx.FadeSize(this,o).hide();
  }) : this._hide();
};

$.fn.show = function(a,o) {
  o = $.speed(a,o);
  return a ? this.each(function(){
    new fx.FadeSize(this,o).show();
  }) : this._show();
};

$.fn.slideDown = function(a,o) {
  o = $.speed(a,o);
  return this.each(function(){
    new fx.Resize(this,o).show("height");
  });
};

$.fn.slideUp = function(a,o) {
  o = $.speed(a,o);
  return this.each(function(){
    new fx.Resize(this,o).hide("height");
  });
};

$.fn.fadeOut = function(a,o) {
  o = $.speed(a,o);
  return a ? this.each(function(){
    new fx.Opacity(this,o).hide();
  }) : this._hide();
};

$.fn.fadeIn = function(a,o) {
  o = $.speed(a,o);
  return a ? this.each(function(){
    new fx.Opacity(this,o).show();
  }) : this._show();
};

$.fn.center = function(f) {
  return this.each(function(){
		if ( !f && this.nodeName == 'IMG' &&
				 !this.offsetWidth && !this.offsetHeight ) {
			var self = this;
			setTimeout(function(){
				$(self).center(true);
			}, 13);
		} else {
			var s = this.style;
			var p = this.parentNode;
			if ( $.css(p,"position") == 'static' )
				p.style.position = 'relative';
			s.position = 'absolute';
			s.left = parseInt(($.css(p,"width") - $.css(this,"width"))/2) + "px";
			s.top = parseInt(($.css(p,"height") - $.css(this,"height"))/2) + "px";
		}
  });
};

$.setAuto = function(e,p) {
  var a = e.style[p];
  var o = $.css(e,p);
  e.style[p] = 'auto';
  var n = $.css(e,p);
  if ( o != n )
    e.style[p] = a;
};