Hide Field based on Page Used

Hi Everyone,

I have custom Order Add pages so that when a user creates a new order from a Client Page, it doesn't display the client name on the order form because you are already on that client. However, if you create an order from the Order list, the order form should display the client lookup field so the user can select the client they are creating the order for. What I want to do is when the page opens (Before Display) test to see which page is being loaded (page with client name) or (page without client name) and then hide that field. I can't seem to find out how to get the page name. Any thoughts on this would be greatly appreciated.

Thanks,
Randy