Show / Hide Pages from DropDownList Selection

I am trying to Show / Hide the final page of an audit report depending on what town is selected from the drop down box.

The code that I'm using is :

if

("4" == xfa.event.newText)

{

= "visible";

}

Page 7 is set to "hidden" as I only want it to show / print if certain towns are selected (Bundaberg being one of them)

The drop down box has had the Values set so "4" = Bundaberg.   The scripting is on a change event.

Can someone please help as this code isn't working.

Thanks.

Jenny