Server or Client side validation?

[eluser]Mr Lazy[/eluser]
Hi,

I have a one field form using the CI validation class, and I must say it is neat. But I also have a page in my application with a large number of checkboxes on it that are dynamicaly displayed based upon data from the database.

My question is, if the validation fails on that page, how do I persist the data? I cannot define it in the controller before hand as I do not know what checkboxes will be on that page.

I am thinking of using client-side (jQuery) validation that can do the validation and there will be no screen refresh, so on screen data persistence will not become an issue.

I am interested to know what experienced CI/PHP folks think about this.

Thanks,
Lazy