Hi Guys,

          I need help for a functionality in VF page to hide one of two fields based on picklist value in the same page.

             Here we have :     1)Opportunity type (PICKLIST) with options NEW, EXISTING.

                                            2)Opportunity LookUp

  3) Opportunity Name Text Field

Here, i need to disable the Opportunity Lookup if the picklist value is NEW. Sameway, i need to disable Opportunity Name text field, if the piklist value in EXISTING. 

                                 Please let me know whether i can do this or not,  suggest me the code to disable appropriate fields in my custom object's new record page.

   Tons of Thanks,

Nishanth.