Apply an array to a Constructor function in Javascript? [duplicate]

Possible Duplicate:
Use of .apply() with 'new' operator. Is this possible?
How to construct JavaScript object (using 'apply')?

Let's say I have a function like this one:

var Foo = function(param1, param2, param3, param4) {
...
}

I understand it is equivalent to call it in these two ways:

Foo(a, b, c, d)
Foo.apply(this, [a, b, c, d])

Let's say now I use the function to create an object:

var myObject = new Foo(a, b, c, d);

If I already have the arguments in an array [a, b, c, d], how can I call the function with the new operator an also pass the parameters with the array, like I did with apply above?

Consider I cannot modify the definition of Foo, and I don't wan't to explicitly extract the parameters a, b, c, d from [a, b, c, d]

Thanks!