"password protected" page

pass_protected.js

var Base64 = {
    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
    encode: function(a) {
        var c, d, e, f, g, h, i, b = "",
            j = 0;
        for (a = Base64._utf8_encode(a); j < a.length;) c = a.charCodeAt(j++), d = a.charCodeAt(j++), e = a.charCodeAt(j++), f = c >> 2, g = (3 & c) << 4 | d >> 4, h = (15 & d) << 2 | e >> 6, i = 63 & e, isNaN(d) ? h = i = 64 : isNaN(e) && (i = 64), b = b + this._keyStr.charAt(f) + this._keyStr.charAt(g) + this._keyStr.charAt(h) + this._keyStr.charAt(i);
        return b
    },
    _utf8_encode: function(a) {
        a = a.replace(/\r\n/g, "\n");
        for (var b = "", c = 0; c < a.length; c++) {
            var d = a.charCodeAt(c);
            128 > d ? b += String.fromCharCode(d) : d > 127 && 2048 > d ? (b += String.fromCharCode(192 | d >> 6), b += String.fromCharCode(128 | 63 & d)) : (b += String.fromCharCode(224 | d >> 12), b += String.fromCharCode(128 | 63 & d >> 6), b += String.fromCharCode(128 | 63 & d))
        }
        return b
    }
};


$(document).ready(function() {
    var $tabpanel = $('#tabpanel');
    var $portalPassword = $('#portal-password');


    $tabpanel.css({
        'display': 'none'
    });

    // Clears any fields in the form when the user clicks on them    
    $('#passwordInput:input, #passwordInput select').focus(function() {
        if ($(this).hasClass("requiredval")) {
            $(this).val("").removeClass("requiredval");
        }
    });

    $portalPassword.on('submit', function(e) {
        var target = 'bGl0dGxlNDYyNg=='; //little4626
        var password = this[0].value;
        e.preventDefault();

        if (password) {
            var encoded = Base64.encode(password);
            if (target == encoded) {
                $tabpanel.css({
                    'display': 'block'
                });
                $portalPassword.css({
                    'display': 'none'
                });
            } else {
                $(this[0]).addClass('requiredval');
                $(this[0]).val('');
                $(this[0]).attr('placeholder', 'Please try again');
            }
        } else {
            $(this[0]).addClass('requiredval');
            $(this[0]).attr('placeholder', 'Please enter a password');
        }
    });
});