How to apply filter on more than 2 dataproviders in webtemplate

HI experts,

my webtemplate is having 2 dataproviders DP1 and DP2. i would like to apl=ply filter to both the dataproviders.

i came to know that , can achive through some javascript code.. I dont know javascript...please give me some sample code...

Please guide me how to do this

Thanks

Anil