Istijmar

Asalamu Alaikum.. My question is about Wudu. When using the bathroom at work, there is no water to make full cleaning before making wudu for prayer. Do I have to make wudu anyway and to pray on time or can I wait till I get home and make it up. Jazakum Allah Kheer.

Assalamu Alaykum,I go to work and school, and return home at night. I make woudo at school, and in that condition I dont have anything to do(istinjaa) with. I compromise by wetting several pieces of napkin, and using that instead of using a cup or something of that nature. I would like to know if that is enough for my woudou to be correct? Jazakum allah kul khair