CMK, I am not sure what you are referring to, could you provide a link to it so we may re-create this "disappearing hidden layer" you speak of ?

Thanks !
Hope this helps,

RandyT

Just to make sure I understand the issue...

User visits a page (page 1) that has a hidden layer
User takes some action on the page and the layer becomes visible
User visits another page (page 2)
User returns to page 1 and the layer is hidden again

You want the layer to remain visible when they return...

I think DSB is on the right track with caching. Basically, when the user returns to the page it goes back to the default settings which had the layer hidden. The only way I can think to get around this is to have it store information on the client machine (e.g. using a session or cookie of some kind) that indicates what layer was visible. Bascially, when the user visits the page it checks the value of the cookie. Depending on that value it determines dynamically which layer should be visible. This could be done using sessions and/or cookies in PHP, but it could also be acheived using cookies and javascript I believe... at least I think you could have javascript check the value of the cookie and dynamically create the CSS code for whether the layer was visible or not... I would probably use PHP to do it because I'm more comfortable with PHP than javascript these days, but I think either should work...