A quick snippet of useful JavaScript functions:

var CommonFunctions = function () {
    function toBoolean(value) {
        switch (value) {
            case true:
            case 'True':
            case 'true':
            case 1:
            case '1':
                return true;
                break;
            default:
                return false;
                break;
        }
    }

    return {
        toBoolean: function (value) {
            return toBoolean(value);
        }
    }
}();