service tax over job work

Ajay Bhatnagar (23 Points)

10 May 2007  
dear sir,
we are fabricating and fixing of aluminium frame and glass also in buildings by provide some skilled, unskilled labor and supervisors. we will not supply any type of materials to our client and our rates are on basis of labor cost. we want to know that any type of service tax applicable on us? if no, which types of taxes applicable on us.