Disable and Enable the Value Prompt

[chaganti26]

Hi
Can any one please help on the following issue.

In report, prompt page contains four Value Prompts.
Year, Quarter, StartWeek and End Week
1.When user select the Year Prompt, then Quarter,StartWeek and EndWeek prompts should get enable.
2. Then after if user select the Quarter, then StartWeek and EndWeek should prompts get disable (or) if user select the StartWeek and EndWeek then Quarter Prompt should get disable.

Note: User does not accept the prompt buttons.

Please help me to solve this.