Retrieving Values from two list using javascript COM

Hi

I have a requirement in which I have 2 list Employee and Project.

Columns of Employee list: Emp ID, Emp Name, ProjID , Location etc..

Column of Project List : ProjID, ProjName, PMID , PMName etc..

Now requirement is to fetch data from two list based on ProjID so resulting columnss will be ProjId,EmpID,EmpName,PMID , PMName etc.... This column is to be shown in a table.

I have to use Javascript client object model to fetch data... 

Please help urgent requirement.