FORMs in Layout

[mzeddd]

I have layout on whole page with menus in 'top' panel and different forms in 'central'.
Content of 'central' panel I load using panel('refresh',url) method.

So, when I load page with form at first time it works fine.
But when I load another content into 'central' and reload the 1st one I have problem with accessing form data via JS function calls.
It seems that using JS calls like

Code:

var a = myForm.myInput.value

I access 'old' form (loaded in 1st load).

How can I get around this problem?

Thanks