ÿþ// Autor: Javier Minsky, Gabriel Weinstein

// Fecha de Creación: 10/01/2006

// Objetivo: No permite la utilizacion ciertas funciones dentro de la pagina, por ej. F11, click derecho





keys = new Array();

keys["f112"] = 'f1';

keys["f113"] = 'f2';

keys["f114"] = 'f3';

keys["f115"] = 'f4';

keys["f116"] = 'f5';

keys["f117"] = 'f6';

keys["f118"] = 'f7';

keys["f119"] = 'f8';

keys["f120"] = 'f9';

keys["f121"] = 'f10';

keys["f122"] = 'f11';

keys["f123"] = 'f12';



var asciiBackspace  = 8;

var asciiALT        = 18;

var asciiEnd        = 35;

var asciiHome       = 36;

var asciiLeftArrow  = 37;

var asciiUpArrow    = 38;

var asciiRightArrow = 39;

var asciiDownArrow  = 40;

var asciiMS         = 92;

var asciiView       = 93;



var asciiBack        = 166;

var asciiFwd        = 167;

var asciiWWW        = 172;



var asciiUpperA        = 65;

var asciiLowerA        = 97;

var asciiUpperC        = 67;

var asciiLowerC        = 99;

var asciiUpperV        = 86;

var asciiLowerV        = 118;

var asciiUpperX        = 88;

var asciiLowerX        = 120;

var asciiUpperY        = 89;

var asciiLowerY        = 121;

var asciiUpperZ        = 90;

var asciiLowerZ        = 122;



var asciiUpperQ        = 81;

var asciiLowerQ        = 113;

var asciiNumber2    = 50;

var asciiPAD2        = 98;



var asciiArroba = 64;



isNN = document.layers ? 1 : 0;

if(isNN){ 

    document.captureEvents(Event.MOUSEDOWN);

    document.captureEvents(Event.KEYPRESS);

}



document.oncontextmenu = noContext;

document.onkeypress    = noContextKey;

document.onmousedown   = noClick;

document.onmouseup     = noClick;



function goToDown(){

    if (typeof window.event != 'undefined'){

        window.document.onkeydown = function()

        {

            // Capture and remap F-key

            if(window.event && keys["f"+window.event.keyCode]){

                saveCode=window.event.keyCode;

                window.event.keyCode = 505;        //assing the keycode 505

            }

            if(window.event && window.event.keyCode == 505)

                return false; // Must return false or the browser will execute old code



            if (event.altKey)

                if (event.altLeft)

                    return false;

                else

                    return true;



            if (event.ctrlKey)

                if (!teclaPermitidaCTRL(event.keyCode))

                    return false;

            

            var EventStatus = event.srcElement.tagName.toUpperCase();

            if (EventStatus == 'INPUT' || EventStatus == 'TEXTAREA')

                return event.keyCode;

            else{

                if (event.keyCode == asciiBackspace)    return false;

                if (event.keyCode == asciiMS)            return false;

                if (event.keyCode == asciiView)            return false;



                //teclas atras, home y adelante del teclado

                if (event.keyCode == asciiBack)            return false;

                if (event.keyCode == asciiFwd)            return false;

                if (event.keyCode == asciiWWW)            return false;

            }

        }

    }

}



function teclaPermitidaCTRL(keyCode){

    //a, A

    if (keyCode == asciiUpperA) return true;

    if (keyCode == asciiLowerA) return true;

    //c, C

    if (keyCode == asciiUpperC) return true;

    if (keyCode == asciiLowerC) return true;

    //x, X

    if (keyCode == asciiUpperX) return true;

    if (keyCode == asciiLowerX) return true;

    //v, V

    if (keyCode == asciiUpperV) return true;

    if (keyCode == asciiLowerV) return true;

    //y, Y

    if (keyCode == asciiUpperY) return true;

    if (keyCode == asciiLowerY) return true;

    //z, Z

    if (keyCode == asciiUpperZ) return true;

    if (keyCode == asciiLowerZ) return true;



    //end, home

    if (keyCode == asciiEnd) return true;

    if (keyCode == asciiHome) return true;



    //flechitas

    if (keyCode == asciiLeftArrow)    return true;

    if (keyCode == asciiUpArrow)    return true;

    if (keyCode == asciiRightArrow) return true;

    if (keyCode == asciiDownArrow)    return true;



    return false;

}



function teclaPermitidaALT(keyCode){

    if (keyCode == asciiALT) return true;



    //q, Q

    if (keyCode == asciiUpperQ) return true;

    if (keyCode == asciiLowerQ) return true;

    if (keyCode == asciiArroba) return true;

    

    //2, 2

    if (keyCode == asciiNumber2) return true;

    if (keyCode == asciiPAD2) return true;



    return false;

}



function noContext(){return false;}



function noContextKey(e) {

    if (navigator.appName == "Microsoft Internet Explorer"){

        tmp = String.fromCharCode(window.event.keyCode);

        var EventStatus = '';

    }else{

        tmp = e.which;



        if (e.charCode == 0){

            //teclas desde f1 hasta f12

            if (keys["f"+e.keyCode])    return false;



            if (e.keyCode == asciiMS)   return false;

            if (e.keyCode == asciiView) return false;



            //teclas atras, home y adelante del teclado

            if (e.keyCode == asciiBack) return false;

            if (e.keyCode == asciiFwd)  return false;

            if (e.keyCode == asciiWWW)  return false;



            //end, home

            if (e.keyCode == asciiEnd) return true;

            if (e.keyCode == asciiHome) return true;



            //flechitas

            if (e.keyCode == asciiLeftArrow)    return true;

            if (e.keyCode == asciiUpArrow)    return true;

            if (e.keyCode == asciiRightArrow) return true;

            if (e.keyCode == asciiDownArrow)    return true;

        }



        if (e.altKey)

            if (!teclaPermitidaALT(tmp))    return false;



        if (e.ctrlKey)

            if (!teclaPermitidaCTRL(tmp))    return false;



        var EventStatus = e.target.nodeName.toUpperCase();

        if (EventStatus != 'INPUT' && EventStatus != 'TEXTAREA')

            if (tmp == asciiBackspace)    return false;

    }

    return;

}



function noClick(e) {

    if (document.all)

        if (event.button > 1)    return false;

    if (document.layers)

        if (e.which == 3)        return false;

}