Setting a 'life-time' clock to a displayed information

Hi all, I'm interested in finding out a way to set a time limit to a displayed information - i.e. the displayed information will sieze to appear to a viewer's browser once a set time period is reached. What I'm trying to achieve is a situation whereby a certain 'info' (like an order!) would only appear to a target viewer (like a supplier!) for example (say) 30 minutes and if that viewer did not react within the set time, the information will sieze to appear to his/her browser so that the same information could be forwarded to the next viewer (supplier)on the list. The setting of time approach is to avoid having two people working on the same information at the same time. I'd really appreciate any hint/help Thanks in advance Ike __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/