function $(i){
	return document.getElementById(i);
}
function ltrim(str){
	return str.replace(/^(\s+)/g, '');
}

function rtrim(str){
	return str.replace(/(\s+)$/g, '');
}

function trim(str){
	return ltrim(rtrim(str));
}
function Navegador(){
	this.esIE = false;// Internet Explorer
	this.esIE6 = false;
	this.esIE7 = false;
	this.esFf = false;// Mozilla
	this.esOp = false;// Opera
	this.esNs = false;// Netscape
	
	if(window.navigator.userAgent.search(RegExp("MSIE","im"))!=-1){
		this.esIE = true;
		if(window.navigator.userAgent.search(RegExp("6","im"))!=-1) this.esIE6 = true;
		else if(window.navigator.userAgent.search(RegExp("7","im"))!=-1) this.esIE7 = true;
	}
	else if(window.navigator.userAgent.search(RegExp("Firefox","im"))!=-1) this.esFf = true;
	else if(window.navigator.userAgent.search(RegExp("Opera","im"))!=-1) this.esOp = true;
	else if(window.navigator.userAgent.search(RegExp("Safari","im"))!=-1) this.esSa = true;
	else if(window.navigator.userAgent.search(RegExp("Netscape","im"))!=-1) this.esNs = true;
};
var Nav = new Navegador();
Function.prototype.closure = function(obj){
	// Init object storage.
	if (!window.__objs){
		window.__objs = [];
		window.__funs = [];
	}
	
	// For symmetry and clarity.
	var fun = this;
	
	// Make sure the object has an id and is stored in the object store.
	var objId = obj.__objId;
	if (!objId) __objs[objId = obj.__objId = __objs.length] = obj;
	
	// Make sure the function has an id and is stored in the function store.
	var funId = fun.__funId;
	if (!funId) __funs[funId = fun.__funId = __funs.length] = fun;
	
	// Init closure storage.
	if (!obj.__closures) obj.__closures = [];
	
	// See if we previously created a closure for this object/function pair.
	var closure = obj.__closures[funId];
	if (closure) return closure;
	
	// Clear references to keep them out of the closure scope.
	obj = null;
	fun = null;
	
	// Create the closure, store in cache and return result.
	var o = __objs[objId].__closures[funId] = function (){
		if(!!__funs[funId] && !!__objs[objId]) return __funs[funId].apply(__objs[objId], arguments);
		else return false;
	};
	o.__funId = funId;
	return o;
	
};

var EliminarClosures = function(o){
	var i = 0;
	if(o){
		if(o.__objId){
			for(i in o.__closures){
				delete(window.__funs[i]);
				delete(o.__closures[i]);
			}
			delete(window.__objs[o.__objId]);
			/*delete(o.__closures);
			delete(o.__objId);*/
			o.__closures = null;
			o.__objId = null;
		}
	}
	i = null;
}

var LimpiarClosures = function(){
	if(!!Nav && !Nav.esIE) window.addEventListener('unload', LimpiarClosures, false);
	else window.detachEvent("onunload",LimpiarClosures);
	
	if(window.__objs){
		for(i in window.__objs) EliminarClosures(window.__objs[i]);
	}
	window.__objs = [];
	window.__funs = [];
};

var Limpiar = function(){
	if(!!Nav && !Nav.esIE) window.addEventListener('unload', LimpiarClosures, false);
	else window.attachEvent("onunload", LimpiarClosures);
}();

document.LimpiarClosures  = LimpiarClosures;
function opacity(e, n){
	var o = (typeof(e)=='object')? e : $(e);
	if(!!o){
		if(Nav.esIE) o.style.filter = 'alpha(opacity='+n+')';
		else if(Nav.esFf) o.style.MozOpacity = (n < 100)? '.'+n : 1;
		else if(Nav.esOp) o.style.opacity = (n < 100)? '.'+n : 1;
	}
	o = null;
}
var Opacity = opacity;AddEvent = function(o, e, f){
	if(Nav.esIE) o.attachEvent('on'+e, f);
	else o.addEventListener(e, f, ((Nav.esOp)? false : true));
};
RemEvent = function(o, e, f){
	if(Nav.esIE) o.detachEvent('on'+e, f);
	else o.removeEventListener(e, f, ((Nav.esOp)? false : true));
};
FireEvent = function(o, e){
	var evt = null;
	if(Nav.esIE) o.fireEvent('on'+e);
	else{
		if(e=='click' || e=='dblclick' || e=='mousedown' || e=='mousemove' || e=='mouseout' || e=='mouseover' || e=='mouseup'){
			evt = document.createEvent("MouseEvents");
			evt.initMouseEvent(e, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
		}
		else if(e=='keydown' || e == 'keypress' || e == 'keyup'){
			evt = document.createEvent("KeyboardEvent");
			evt.initKeyEvent(e, true, true, null, false, false, false, false, 9, 0);
		}
		else{
			evt = document.createEvent("Event");
			evt.initEvent(e, true, false);
		}
		o.dispatchEvent(evt);
	}
}
StopEvent = function(e){
	if(Nav.esIE){
		e.returnValue = false;
		e.cancelBubble = true;
	}
	else{
		e.preventDefault();
		e.stopPropagation();
	}
}