Function.prototype.createDelegate = function(obj, args, appendArgs) {
    var method = this;
    return function() {
        var callArgs = args || arguments;
        if (appendArgs === true) {
            callArgs = Array.prototype.slice.call(arguments, 0);
            callArgs = callArgs.concat(args);
        } else if (typeof appendArgs == "number") {
            callArgs = Array.prototype.slice.call(arguments, 0);
            var applyArgs = [appendArgs, 0].concat(args);
            Array.prototype.splice.apply(callArgs, applyArgs);
        }
        return method.apply(obj || window, callArgs);
    };
};