best strategy to prevent BACK BUTTON from messing up shopping cart quantities

[slushpuppie]

trying to figure out how to handle this scenario:

 

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say i have 5 items in a shopping cart and hit a button to delete them all. i will then be shown a shopping cart with 0 items(or any empty cart message)... but if i hit the BACK BUTTON in my browser the shopping cart would still show 5 items in it...

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what strategy could be used to get around this? is there something that could force the page to refresh once it's loaded? or a way to make the page pull in the proper quantity whether it's being loaded or reached by the back button?

 

thanks.