String.prototype.decodeEntities.js

if (typeof String.prototype.decodeEntities == 'undefined') {
    (function () {
        // this prevents any overhead from creating the object each time
        var element = document.createElement('div');
        String.prototype.decodeEntities = function () {
            var str = this;
            // strip script/html tags
            str = str.replace(/<script[^>]*>([\S\s]*?)<\/script>/gmi, '');
            str = str.replace(/<\/?\w(?:[^"'>]|"[^"]*"|'[^']*')*>/gmi, '');
            element.innerHTML = str;
            str = element.textContent;
            element.textContent = '';
            return str;
        };
    })();
}