/*
Dependencias: jQuery.UI
*/

/*
ACCESIBILIDAD
*/
jQuery.font = {
	units : '%',
	defaultSize : 100,
	currentSize : 100,
	maxSize: 200,
	minSize: 50,
	zoomStep: 10,
	zoom : function(newSize){
		if ((this.units!='em') || (this.units!='%')){
			this.units='%';
		}
		var stObj = (document.getElementById) ? document.getElementById('header') : document.all('header');
		document.body.style.fontSize = newSize + this.units;
		this.currentSize = newSize;
	},
	zoomIn : function(){
		if (this.currentSize <= this.maxSize){
			this.currentSize += this.zoomStep;
			this.zoom(this.currentSize);
		}else{
			this.zoom(100);
		}
	},
	zoomOut : function(){
		if (this.currentSize >= this.minSize){
			this.currentSize -= this.zoomStep;
			this.zoom(this.currentSize);
		}else{
			this.zoom(100);
		}	
	}
}

/*
FORMULARIOS
*/


$.isEmail = function(s){
	var filter=/^[A-Za-z][A-Za-z0-9_.-]*@[A-Za-z0-9_]+.[A-Za-z0-9_.]+[A-za-z]$/;
	if (s.length == 0 ) return false;
	else{
		if (filter.test(s))
			return true;
		else
			return false;
	}
}

$.clearForm = function(form){
		$(':input',$(form)).each(function(){
			var type = this.type;
			var tag = this.tagName.toLowerCase();
			if (type == 'text' || type == 'password' || tag == 'textarea')
				this.value = "";
			else if (type == 'checkbox' || type == 'radio')
				this.checked = false;
			else if (tag == 'select')
				this.selectedIndex = -1;
		});
}

/*
EVENTOS
*/

$.isEnterPressed = function(e){
	var keycode=null;
	if (e!=null){
		if (window.event!=undefined){
			if (window.event.keyCode) keycode = window.event.keyCode;
			else if (window.event.charCode) keycode = window.event.charCode;
		}else{
			keycode = e.keyCode;
		}
	}
	return (keycode == 13);
}

$.onIntroGoTo = function(e, texto, url, escapeText){
	e = e  || null;
	escapeText = escapeText || false;
	//capturar el intro:
	var keycode=null;
	if (e!=null){
		if (window.event!=undefined){
			if (window.event.keyCode) keycode = window.event.keyCode;
			else if (window.event.charCode) keycode = window.event.charCode;
		}else{
			keycode = e.keyCode;
		}
	}
	//end
	if (((keycode == 13) || (keycode == null))){
		if (escapeText) window.location.href=url+texto;
		else window.location.href=url+escape(texto);
	}
}

/*
EFECTOS
*/

$.fn.blind = function(options){
	options = options || {};
	options.size = options.size || '0px';
	options.opacity = options.opacity || 1;
	options.duration = options.duration || 1000;
	options.direction = options.direction || 'vertical';
	if (options.direction=='vertical'){
		if ($(this).css('height')=='0px'){
			$(this).animate({height:options.size, opacity:options.opacity},options.duration);
		}else{
			$(this).animate({height:0, opacity:0},options.duration);
		}
	}else{
		if ($(this).css('width')=='0px'){
			$(this).animate({width:options.size, opacity:options.opacity},options.duration);
		}else{
			$(this).animate({width:0, opacity:0},options.duration);
		}
	}
	return $(this);
}

$.fn.blink = function(color2, color1, duration){//end color, start color
	color1 = color1 || '#000';
	color2 = color2 || '#fff';
	duration = duration || 2000;
	$(this)
		.animate({backgroundColor:color1},'fast')
		.animate({backgroundColor:color2},'fast')
		.animate({backgroundColor:color1},'fast')
		.animate({backgroundColor:color2},'fast')
		.animate({backgroundColor:color1},'fast')
		.animate({backgroundColor:color2},'fast')
		.effect("highlight", { color: color1 }, duration);
	return $(this);
}



/*
FECHAS
*/

var date_regex = /(\d{1,2})\/(\d{1,2})\/(\d{4})/

//Devuelve -1 , 0 o 1 si fecha1 es menor, igual o mayor que fecha2
$.dateCompare = function(date1,date2){ 
	//formato dd/mm/aaaa
	var dt1 = date_regex.exec(date1);
	var dt2 = date_regex.exec(date2);
	if ((dt1 == null) || (dt2 == null)) return 2;
	else{
		dt1 = new Date( parseInt(dt1[3]), parseInt(dt1[2], 10) - 1, parseInt(dt1[1], 10) );
		dt2 = new Date( parseInt(dt2[3]), parseInt(dt2[2], 10) - 1, parseInt(dt2[1], 10) );

		if (dt1 < dt2) return -1;
		else if (dt1 == dt2) return 0;
		else if (dt1 > dt2) return 1;
	}
}

//Devuelve el día siguiente de una fecha con el formato dd/mm/aaaa de tipo string
$.nextDay = function(fecha){
	var dt = date_regex.exec(fecha);
	if (dt==null) return null;
	else{
		dt = new Date( parseInt(dt[3]), parseInt(dt[2], 10) - 1, parseInt(dt[1], 10) );
	}
	dt.setDate(dt.getDate()+1);
	var dia = dt.getDate();
	var mes = dt.getMonth();
	mes++;
	var any = dt.getFullYear();
	if (dia.toString().length == 1) dia = '0'+dia;
	if (mes.toString().length == 1) mes = '0'+mes;
	return dia + "/" + mes + "/" + any;
}

//Devuelve el día anterior de una fecha con el formato dd/mm/aaaa de tipo string
$.prevDay = function(fecha){
	var dt = date_regex.exec(fecha);
	if (dt==null) return null;
	else{
		dt = new Date( parseInt(dt[3]), parseInt(dt[2], 10) - 1, parseInt(dt[1], 10) );
	}
	dt.setDate(dt.getDate()-1);
	var dia = dt.getDate();
	var mes = dt.getMonth();
	mes++;
	var any = dt.getFullYear();
	if (dia.toString().length == 1) dia = '0'+dia;
	if (mes.toString().length == 1) mes = '0'+mes;
	return dia + "/" + mes + "/" + any;
}

//Comprueba que la fecha del campo1 siempre sea anterior a la del campo2, sino pondrá fechas por defecto (anterior o posterior)  (jquery)
$.dateCheck = function(campo1, campo2, numcampo){
	numcampo = numcampo || 1; //campo a cambiar
	if (dateCompare($(campo1).val(),$(campo2).val())!=-1){
		if (numcampo == 1){
			$(campo1).val(prevDay($(campo2).val()));
		}else{
			$(campo2).val(nextDay($(campo1).val()));
		}
	}
}

// formatDate :
// a PHP date like function, for formatting date strings
// authored by Svend Tofte <www.svendtofte.com>
// the code is in the public domain
//
// see http://www.svendtofte.com/javascript/javascript-date-string-formatting/
// and http://www.php.net/date
//
// thanks to 
//  - Daniel Berlin <mail@daniel-berlin.de>,
//    major overhaul and improvements
//  - Matt Bannon,
//    correcting some stupid bugs in my days-in-the-months list!
//  - levon ghazaryan. pointing out an error in z switch.
//  - Andy Pemberton. pointing out error in c switch 
//
// input : format string
// time : epoch time (seconds, and optional)
//
// if time is not passed, formatting is based on 
// the current "this" date object's set time.
//
// supported switches are
// a, A, B, c, d, D, F, g, G, h, H, i, I (uppercase i), j, l (lowecase L), 
// L, m, M, n, N, O, P, r, s, S, t, U, w, W, y, Y, z, Z
// 
// unsupported (as compared to date in PHP 5.1.3)
// T, e, o

Date.prototype.formatDate = function (input,time) {
    
    var daysLong =    ["Sunday", "Monday", "Tuesday", "Wednesday", 
                       "Thursday", "Friday", "Saturday"];
    var daysShort =   ["Sun", "Mon", "Tue", "Wed", 
                       "Thu", "Fri", "Sat"];
    var monthsShort = ["Jan", "Feb", "Mar", "Apr",
                       "May", "Jun", "Jul", "Aug", "Sep",
                       "Oct", "Nov", "Dec"];
    var monthsLong =  ["January", "February", "March", "April",
                       "May", "June", "July", "August", "September",
                       "October", "November", "December"];

    var switches = { // switches object
        
        a : function () {
            // Lowercase Ante meridiem and Post meridiem
            return date.getHours() > 11? "pm" : "am";
        },
        
        A : function () {
            // Uppercase Ante meridiem and Post meridiem
            return (this.a().toUpperCase ());
        },
    
        B : function (){
            // Swatch internet time. code simply grabbed from ppk,
            // since I was feeling lazy:
            // http://www.xs4all.nl/~ppk/js/beat.html
            var off = (date.getTimezoneOffset() + 60)*60;
            var theSeconds = (date.getHours() * 3600) + 
                             (date.getMinutes() * 60) + 
                              date.getSeconds() + off;
            var beat = Math.floor(theSeconds/86.4);
            if (beat > 1000) beat -= 1000;
            if (beat < 0) beat += 1000;
            if ((String(beat)).length == 1) beat = "00"+beat;
            if ((String(beat)).length == 2) beat = "0"+beat;
            return beat;
        },
        
        c : function () {
            // ISO 8601 date (e.g.: "2004-02-12T15:19:21+00:00"), as per
            // http://www.cl.cam.ac.uk/~mgk25/iso-time.html
            return (this.Y() + "-" + this.m() + "-" + this.d() + "T" + 
                    this.H() + ":" + this.i() + ":" + this.s() + this.P());
        },
        
        d : function () {
            // Day of the month, 2 digits with leading zeros
            var j = String(this.j());
            return (j.length == 1 ? "0"+j : j);
        },
        
        D : function () {
            // A textual representation of a day, three letters
            return daysShort[date.getDay()];
        },
        
        F : function () {
            // A full textual representation of a month
            return monthsLong[date.getMonth()];
        },
        
        g : function () {
           // 12-hour format of an hour without leading zeros, 1 through 12!
           if (date.getHours() == 0) {
               return 12;
           } else {
               return date.getHours()>12 ? date.getHours()-12 : date.getHours();
           }
       },
        
        G : function () {
            // 24-hour format of an hour without leading zeros
            return date.getHours();
        },
        
        h : function () {
            // 12-hour format of an hour with leading zeros
            var g = String(this.g());
            return (g.length == 1 ? "0"+g : g);
        },
        
        H : function () {
            // 24-hour format of an hour with leading zeros
            var G = String(this.G());
            return (G.length == 1 ? "0"+G : G);
        },
        
        i : function () {
            // Minutes with leading zeros
            var min = String (date.getMinutes ());
            return (min.length == 1 ? "0" + min : min);
        },
        
        I : function () {
            // Whether or not the date is in daylight saving time (DST)
            // note that this has no bearing in actual DST mechanics,
            // and is just a pure guess. buyer beware.
            var noDST = new Date ("January 1 " + this.Y() + " 00:00:00");
            return (noDST.getTimezoneOffset () == 
                    date.getTimezoneOffset () ? 0 : 1);
        },
        
        j : function () {
            // Day of the month without leading zeros
            return date.getDate();
        },
        
        l : function () {
            // A full textual representation of the day of the week
            return daysLong[date.getDay()];
        },
        
        L : function () {
            // leap year or not. 1 if leap year, 0 if not.
            // the logic should match iso's 8601 standard.
            // http://www.uic.edu/depts/accc/software/isodates/leapyear.html
            var Y = this.Y();
            if (         
                (Y % 4 == 0 && Y % 100 != 0) ||
                (Y % 4 == 0 && Y % 100 == 0 && Y % 400 == 0)
                ) {
                return 1;
            } else {
                return 0;
            }
        },
        
        m : function () {
            // Numeric representation of a month, with leading zeros
            var n = String(this.n());
            return (n.length == 1 ? "0"+n : n);
        },
        
        M : function () {
            // A short textual representation of a month, three letters
            return monthsShort[date.getMonth()];
        },
        
        n : function () {
            // Numeric representation of a month, without leading zeros
            return date.getMonth()+1;
        },
        
        N : function () {
            // ISO-8601 numeric representation of the day of the week
            var w = this.w();
            return (w == 0 ? 7 : w);
        },
        
        O : function () {
            // Difference to Greenwich time (GMT) in hours
            var os = Math.abs(date.getTimezoneOffset());
            var h = String(Math.floor(os/60));
            var m = String(os%60);
            h.length == 1? h = "0"+h:1;
            m.length == 1? m = "0"+m:1;
            return date.getTimezoneOffset() < 0 ? "+"+h+m : "-"+h+m;
        },
        
        P : function () {
            // Difference to GMT, with colon between hours and minutes
            var O = this.O();
            return (O.substr(0, 3) + ":" + O.substr(3, 2));
        },      
        
        r : function () {
            // RFC 822 formatted date
            var r; // result
            //  Thu         ,     21               Dec              2000
            r = this.D() + ", " + this.d() + " " + this.M() + " " + this.Y() +
            //    16          :    01          :    07               0200
            " " + this.H() + ":" + this.i() + ":" + this.s() + " " + this.O();
            return r;
        },

        s : function () {
            // Seconds, with leading zeros
            var sec = String (date.getSeconds ());
            return (sec.length == 1 ? "0" + sec : sec);
        },        
        
        S : function () {
            // English ordinal suffix for the day of the month, 2 characters
            switch (date.getDate ()) {
                case  1: return ("st"); 
                case  2: return ("nd"); 
                case  3: return ("rd");
                case 21: return ("st"); 
                case 22: return ("nd"); 
                case 23: return ("rd");
                case 31: return ("st");
                default: return ("th");
            }
        },
        
        t : function () {
            // thanks to Matt Bannon for some much needed code-fixes here!
            var daysinmonths = [null,31,28,31,30,31,30,31,31,30,31,30,31];
            if (this.L()==1 && this.n()==2) return 29; // ~leap day
            return daysinmonths[this.n()];
        },
        
        U : function () {
            // Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
            return Math.round(date.getTime()/1000);
        },

        w : function () {
            // Numeric representation of the day of the week
            return date.getDay();
        },
        
        W : function () {
            // Weeknumber, as per ISO specification:
            // http://www.cl.cam.ac.uk/~mgk25/iso-time.html
        
            var DoW = this.N ();
            var DoY = this.z ();

            // If the day is 3 days before New Year's Eve and is Thursday or earlier,
            // it's week 1 of next year.
            var daysToNY = 364 + this.L () - DoY;
            if (daysToNY <= 2 && DoW <= (3 - daysToNY)) {
                return 1;
            }

            // If the day is within 3 days after New Year's Eve and is Friday or later,
            // it belongs to the old year.
            if (DoY <= 2 && DoW >= 5) {
                return new Date (this.Y () - 1, 11, 31).formatDate ("W");
            }
            
            var nyDoW = new Date (this.Y (), 0, 1).getDay ();
            nyDoW = nyDoW != 0 ? nyDoW - 1 : 6;

            if (nyDoW <= 3) { // First day of the year is a Thursday or earlier
                return (1 + Math.floor ((DoY + nyDoW) / 7));
            } else {  // First day of the year is a Friday or later
                return (1 + Math.floor ((DoY - (7 - nyDoW)) / 7));
            }
        },
        
        y : function () {
            // A two-digit representation of a year
            var y = String(this.Y());
            return y.substring(y.length-2,y.length);
        },        
        
        Y : function () {
            // A full numeric representation of a year, 4 digits
    
            // we first check, if getFullYear is supported. if it
            // is, we just use that. ppks code is nice, but wont
            // work with dates outside 1900-2038, or something like that
            if (date.getFullYear) {
                var newDate = new Date("January 1 2001 00:00:00 +0000");
                var x = newDate .getFullYear();
                if (x == 2001) {              
                    // i trust the method now
                    return date.getFullYear();
                }
            }
            // else, do this:
            // codes thanks to ppk:
            // http://www.xs4all.nl/~ppk/js/introdate.html
            var x = date.getYear();
            var y = x % 100;
            y += (y < 38) ? 2000 : 1900;
            return y;
        },

        
        z : function () {
            // The day of the year, zero indexed! 0 through 366
            var s = "January 1 " + this.Y() + " 00:00:00 GMT" + this.O();
            var t = new Date(s);
            var diff = date.getTime() - t.getTime();
            return Math.floor(diff/1000/60/60/24);
        },

        Z : function () {
            // Timezone offset in seconds
            return (date.getTimezoneOffset () * -60);
        }        
    
    }

    function getSwitch(str) {
        if (switches[str] != undefined) {
            return switches[str]();
        } else {
            return str;
        }
    }

    var date;
    if (time) {
        var date = new Date (time);
    } else {
        var date = this;
    }

    var formatString = input.split("");
    var i = 0;
    while (i < formatString.length) {
        if (formatString[i] == "%") {
            // this is our way of allowing users to escape stuff
            formatString.splice(i,1);
        } else {
            formatString[i] = getSwitch(formatString[i]);
        }
        i++;
    }
    
    return formatString.join("");
}


// Some (not all) predefined format strings from PHP 5.1.1, which 
// offer standard date representations.
// See: http://www.php.net/manual/en/ref.datetime.php#datetime.constants
//

// Atom      "2005-08-15T15:52:01+00:00"
Date.DATE_ATOM    = "Y-m-d%TH:i:sP";
// ISO-8601  "2005-08-15T15:52:01+0000"
Date.DATE_ISO8601 = "Y-m-d%TH:i:sO";
// RFC 2822  "Mon, 15 Aug 2005 15:52:01 +0000"
Date.DATE_RFC2822 = "D, d M Y H:i:s O";
// W3C       "2005-08-15 15:52:01+00:00"
Date.DATE_W3C     = "Y-m-d%TH:i:sP";