Has anybody experienced a temporary loss of a roll over image after visiting it.

I am running a 2 frame page with a navbar in the top frame above the mainframe. This also runs off of a 4d server and accordingly I have a java script which tells the top frame to refresh due to the session conditions that need to apply.

When clicking on the selection button the ref link appears in the main frame but the refreshed top nav now has a blank area where the button appeared until you hover the cursor over the area when it will appear again.

I am wondering whether this is a 4d/ java script problem or is it a frame problem? Information on this would be most appreciated. It may be that I cannot see the fault for looking!

Also when viewing the topnav page in a browser everything is AOK

thanks
DenWeb