Generic constructor override with example of Date

ctoroverride.js

(function (context, constructorName, special) {
    var Original;
    Original = context[constructorName];
    context[constructorName] = function PatchedOriginal() {
        var args;
        args = Array.prototype.slice.call(arguments);
        var returnObject;
        if (special) {
            returnObject = special(Original, PatchedOriginal, args);
        }

        if (returnObject != null) {
            return returnObject;
        }

        if (args.length === 0) {
            return new Original();
        } else if (args.length === 1) {
            return new Original(args[0]);
        } else if (args.length === 2) {
            return new Original(args[0], args[1]);
        } else if (args.length === 3) {
            return new Original(args[0], args[1], args[2]);
        } else if (args.length === 4) {
            return new Original(args[0], args[1], args[2], args[3]);
        } else if (args.length === 5) {
            return new Original(args[0], args[1], args[2], args[3], args[4]);
        } else if (args.length === 6) {
            return new Original(args[0], args[1], args[2], args[3], args[4], args[5]);
        } else if (args.length === 7) {
            return new Original(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
        } else if (args.length === 8) {
            return new Original(args[0], args[1], args[2], args[3], args[4], args[5], args[6], args[7]);
        }
    }
    // Copy static properties
    for (var prop in Original) {
        if (Original.hasOwnProperty(prop)) {
            context[constructorName][prop] = Original[prop];
        }
    }
}(window, 'Date', function(Original, PatchedOriginal, args) {
    if (args.length == 1) {
        return new Original(args[0].getTime());
    }
    return null;
}));