How to hide the parameters in the url

Hi,
Can anyone help me to hide the parameters being passed in the url. For example, when a link is clicked i want to pass few parameters to it, but i dont want to display those parameters in the url. Can anyone help me figure out how can i achieve this?
Thanks
ri

In your CO's processFormRequest, do pageContext.putTransactionValue(name, value). You can retrieve the value using pageContext.getTransactionValue(name). Please use your own judgement to use Transaction or Session as the place holder as per your requirement. In most cases, transaction would do but if you want the values to be retained across transactions, use Session. Also, make sure to clear those values when you are done with the values so that this does not get retained across session/transaction.
Incase, you want the values only for the next submit and not for the transaction, you can use pageContext.putParamater() and pageContext.getParameter() which has a very short life cycle.
Regards,
Guru.

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