/*
**************************************
* Event Listener Function v1.4       *
* Autor: Carlos R. L. Rodrigues      *
**************************************
*/
addEvent = function(o, e, f, s){
	var r = o[r = "_" + (e = "on" + e)] = o[r] || (o[e] ? [[o[e], o]] : []), a, c, d;
	r[r.length] = [f, s || o], o[e] = function(e){
		try{
			(e = e || event).preventDefault || (e.preventDefault = function(){e.returnValue = false;});
			e.stopPropagation || (e.stopPropagation = function(){e.cancelBubble = true;});
			e.target || (e.target = e.srcElement || null);
			e.key = (e.which + 1 || e.keyCode + 1) - 1 || 0;
		}catch(f){}
		for(d = 1, f = r.length; f; r[--f] && (a = r[f][0], o = r[f][1], a.call ? c = a.call(o, e) : (o._ = a, c = o._(e), o._ = null), d &= c !== false));
		return e = null, !!d;
    }
};

removeEvent = function(o, e, f, s){
	for(var i = (e = o["_on" + e] || []).length; i;)
		if(e[--i] && e[i][0] == f && (s || o) == e[i][1])
			return delete e[i];
	return false;
};






//<![CDATA[
//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/dhtml/drag-library [v1.1]

//=============================================================
// REQUIRES http://www.jsfromhell.com/geral/event-listener v1.4
//=============================================================

Dragger = function(o, a){
	var $ = this;
	o.style.position = "absolute", $.object = o, $.d = {x: 0, y: 0}, $.f = [];
	a && (addEvent(o, "mousedown", function(){return this.start(), false;}, $),
		addEvent(document, "mouseup", function(){this.dragging && this.stop();}, $));
}
with({p: Dragger.prototype, c: Dragger}){
	p._updateMouse = function(e){
		var w = window, b = document.body;
		p.mouse = {x: e.clientX + (w.scrollX || b.scrollLeft || b.parentNode.scrollLeft || 0),
			y: e.clientY + (w.scrollY || b.scrollTop || b.parentNode.scrollTop || 0)};
	};
	addEvent(document, "mousemove", p._updateMouse);
	p.mouse = {x: 0, y: 0};
	p.dragging = false;
	p.start = function(center){
		var r, $ = this, m = $.mouse, o = $.object;
		for(var r = {l: o.offsetLeft, t: o.offsetTop, w: o.offsetWidth, h: o.offsetHeight};
			o = o.offsetParent; r.l += o.offsetLeft, r.t += o.offsetTop);
		!$.dragging && ($.dragging = true, o = $.object, $.d = center &&
			(m.x < r.l || m.x > r.l + r.w || m.y < r.t || m.y > r.t + r.h) ?
			{x: r.w / 2, y: r.h / 2} : {x: m.x - o.offsetLeft, y: m.y - o.offsetTop},
			addEvent(document, "mousemove", $.drag, $),
			this.callEvent("onstart"));
	};
	p.drag = function(e){
		var i, p, $ = this, o = $.object, m = ($._updateMouse(e), (m = $.mouse).x -= $.d.x, m.y -= $.d.y, m);
		for(i = $.f.length; i; $.f[--i] && $.f[i][0].apply(m, $.f[i][1]));
		o.style.left = m.x + "px", o.style.top = m.y + "px";
		return !!this.callEvent("ondrag", e);
	};
	p.stop = function(){
		this.dragging = false;
		removeEvent(document, "mousemove", this.drag, this);
		this.callEvent("onstop");
	};
	p.addFilter = function(f, arg0, arg1, arg2, argN){
		this.f[this.f.length] = [f, [].slice.call(arguments, 1)];
	};
	p.callEvent = function(e){
		return this[e] instanceof Function ? this[e].apply(this, [].slice.call(arguments, 1)) : undefined;
	};
}
//]]>