JS ENCRYPT

function getletter(num) {
    if (num < 10) {
        return num;
    } else {
        if (num == 10) {
            return "A"
        }
        if (num == 11) {
            return "B"
        }
        if (num == 12) {
            return "C"
        }
        if (num == 13) {
            return "D"
        }
        if (num == 14) {
            return "E"
        }
        if (num == 15) {
            return "F"
        }
    }
};

function hexfromdec(num) {
    if (num > 65535) {
        return ("err!")
    }
    first = Math.round(num / 4096 - .5);
    temp1 = num - first * 4096;
    second = Math.round(temp1 / 256 - .5);
    temp2 = temp1 - second * 256;
    third = Math.round(temp2 / 16 - .5);
    fourth = temp2 - third * 16;
    return ("" + getletter(third) + getletter(fourth));
};

function encrypt(tx) {
    var hex = '';
    var i;
    for (i = 0; i < tx.length; i++) {
        hex += '%' + hexfromdec(tx.charCodeAt(i));
    };
    return hex;
};
/*
encrypt('SEU TEXTO');
Depois pra usar:
eval(unescape('O QUE APARECEU'));
*/