function LoadFile(file, type, OnLoad) {
    var html_doc = document.getElementsByTagName('head')[0];
	var PrimeraVez = true;
    if (type.toUpperCase()=='SCRIPT') {
		F = document.createElement('script');
		F.setAttribute('type', 'text/javascript');
		F.setAttribute('src', file);
	} else if (type.toUpperCase()=='LINK') {
		F = document.createElement('link');
		F.setAttribute('rel', 'stylesheet');
		F.setAttribute('type', 'text/css');
		F.setAttribute('href', file);
	}
    html_doc.appendChild(F);
	
	NOTA = 'Este evento funciona con IE';
    F.onreadystatechange= function (e) {  
        if (('loaded' == this.readyState || 'complete' == this.readyState)) {  
			Nota = 'OnLoad se ejecuta dos veces cuando el tipo es CSS, CUIDADO CON ESTO';
			if (OnLoad) {eval(OnLoad);}
		}  
    };

	NOTA = 'Este evento funciona con Firefox';
    F.onload = function() {
		Nota = 'OnLoad NO se ejecuta CSS, CUIDADO CON ESTO';
		if (OnLoad) {eval(OnLoad);}
	}
    return false;
}

function LoadStyles(filename) {
	// http://www.javascriptkit.com/javatutors/loadjavascriptcss.shtml
	var fileref=document.createElement("link");
	fileref.setAttribute("rel", "stylesheet");
	fileref.setAttribute("type", "text/css");
	fileref.setAttribute("href", filename);
	document.getElementsByTagName("head")[0].appendChild(fileref);
	//Log('ok','Syles Loaded', filename);
}

function EsFechaYMD(Dato) { return EvaluaRegEx('(19|20)[0-9]{2}\\/(0[1-9]|1[012])\\/(0[1-9]|[12][0-9]|3[01])', Dato); }
function EsNumeroEntero(Dato) { return EvaluaRegEx('^[-+]?\\d+$', Dato); }
function EsNumeroEnteroSinSigno(Dato) { return EvaluaRegEx('^\\d+$', Dato); }
function EsNumeroSencillo(Dato) { return EvaluaRegEx('^[-+]?\\b[0-9]*\\.?[0-9]+\\b$', Dato); }
function EsNumeroSencilloSinSigno(Dato) { return EvaluaRegEx('^[0-9]*\\.[0-9]+$', Dato); }

function EsEmail(Dato) { return EvaluaRegEx('^[A-Za-z0-9._%+-]+@(?:[A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}$', Dato); }

function EsFechaDDMMYY(Dato) { return EvaluaRegEx('^(0[1-9]|[12][0-9]|3[01])\\/(0[1-9]|1[012])\\/[0-9]{2}$', Dato); }
function EsHoraHHNN(Dato) { return EvaluaRegEx('^([0-1][0-9]|2[0-3]):([0-5][0-9])$', Dato); }

function EvaluaRegEx(RegularExpresion, Dato) {
    var RE = new RegExp(RegularExpresion);
    if (Dato.match(RE)) {
        return true;
    } else {
        return false;
    }
}
// Simulates PHP's date function (http://jacwright.com/projects/javascript/date_format)
Date.prototype.format = function(format) {
	var returnStr = '';
	var replace = Date.replaceChars;
	for (var i = 0; i < format.length; i++) {
		var curChar = format.charAt(i);
		if (replace[curChar]) {
			returnStr += replace[curChar].call(this);
		} else {
			returnStr += curChar;
		}
	}
	return returnStr;
};
Date.replaceChars = {
	shortMonths: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
	longMonths: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
	shortDays: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
	longDays: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
	
	// Day
	d: function() { return (this.getDate() < 10 ? '0' : '') + this.getDate(); },
	D: function() { return Date.replaceChars.shortDays[this.getDay()]; },
	j: function() { return this.getDate(); },
	l: function() { return Date.replaceChars.longDays[this.getDay()]; },
	N: function() { return this.getDay() + 1; },
	S: function() { return (this.getDate() % 10 == 1 && this.getDate() != 11 ? 'st' : (this.getDate() % 10 == 2 && this.getDate() != 12 ? 'nd' : (this.getDate() % 10 == 3 && this.getDate() != 13 ? 'rd' : 'th'))); },
	w: function() { return this.getDay(); },
	z: function() { return "Not Yet Supported"; },
	// Week
	W: function() { return "Not Yet Supported"; },
	// Month
	F: function() { return Date.replaceChars.longMonths[this.getMonth()]; },
	m: function() { return (this.getMonth() < 9 ? '0' : '') + (this.getMonth() + 1); },
	M: function() { return Date.replaceChars.shortMonths[this.getMonth()]; },
	n: function() { return this.getMonth() + 1; },
	t: function() { return "Not Yet Supported"; },
	// Year
	L: function() { return "Not Yet Supported"; },
	o: function() { return "Not Supported"; },
	Y: function() { return this.getFullYear(); },
	y: function() { return ('' + this.getFullYear()).substr(2); },
	// Time
	a: function() { return this.getHours() < 12 ? 'am' : 'pm'; },
	A: function() { return this.getHours() < 12 ? 'AM' : 'PM'; },
	B: function() { return "Not Yet Supported"; },
	g: function() { return this.getHours() % 12 || 12; },
	G: function() { return this.getHours(); },
	h: function() { return ((this.getHours() % 12 || 12) < 10 ? '0' : '') + (this.getHours() % 12 || 12); },
	H: function() { return (this.getHours() < 10 ? '0' : '') + this.getHours(); },
	i: function() { return (this.getMinutes() < 10 ? '0' : '') + this.getMinutes(); },
	s: function() { return (this.getSeconds() < 10 ? '0' : '') + this.getSeconds(); },
	// Timezone
	e: function() { return "Not Yet Supported"; },
	I: function() { return "Not Supported"; },
	O: function() { return (this.getTimezoneOffset() < 0 ? '-' : '+') + (this.getTimezoneOffset() / 60 < 10 ? '0' : '') + (this.getTimezoneOffset() / 60) + '00'; },
	T: function() { return "Not Yet Supported"; },
	Z: function() { return this.getTimezoneOffset() * 60; },
	// Full Date/Time
	c: function() { return "Not Yet Supported"; },
	r: function() { return this.toString(); },
	U: function() { return this.getTime() / 1000; }
};
function DigitoALetra(N) {
	var d = new Array('Cero','Uno','Dos','Tres','Cuatro','Cinco','Seis','Siete','Ocho','Nueve');
	return d[N];
}
String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
	return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
	return this.replace(/\s+$/,"");
}