BAd solution

function fixCasing(value) {

    function randomCase (word) {
        var result = "";
        for (var i = 0; i < word.length; i++) {
            var randol = Math.random();
            if (randol <= 0.5) {
                result += word.charAt(i).toUpperCase();
            }
            else {
                result += word.charAt(i).toLowerCase();
            }
        }
        return result;
    }
    var result = value.match(/<mixcase>(.*?)<\/mixcase>/g).map(function (val) {
        return val.replace(/<\/*.*?>/g, '');
    });
    var applyMixed = value;
    value = '\"' + value + '\"';
    console.log(value);
    for (var i = 0; i < result.length; i++) {
        value += ".replace('/<mixcase>(.*?)<\/mixcase>\/g, result[" + i + '])';
    }

    var newString = eval(value);

    console.log(newString);



    //var cleanText = value.replace(/<\/?[^>]+(>|$)/g, "");
    // console.log(cleanText);




}

fixCasing('We are <mixcase>living</mixcase> in a <upcase>yellow submarine</upcase>. We <mixcase>dont</mixcase> have <lowcase>anything<\/lowcase> else.');