Input hidden

[eluser]the_unforgiven[/eluser]
I have a input hidden field and I want to grab the value in my model

but this doesn't seem to work

Code:

'CustomerID'  => $this->input->post('CustomerID'),

So i tried this

Code:

'CustomerID'  => $this->input->hidden('CustomerID'),

And then got this error:

Fatal error: Call to undefined method CI_Input::hidden()

What should i do to achieve this?