Hide the portlets in a portal

Hi,
I need some help on Weblogic Portal server. Following is my scenario.
I have a portal created. I have a page with two columns in that. In the left column I have a portlet which has a select box with 8 values with the option to select multiple value and a submit button. In the right column of the page I have 8 different portlets created and placed. During run time when the user browses this portal I need to hide all the 8 portlets in the right column. Later if he selects say 3 options from the left column select box and submits, I have to display corresponding 3 portlets in the right columns and others continue to be hidden.
Please give me a solution for this.
Thanks
Pradeep.

u can use the portletbackingcontext and set the visibility of a portlet to true or false.
Kunal Mittal

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