Load Balaced MTS

Hello,

I am interested in opting for a Load Balanced Cluster server since its quite easy as we have got the load Balancing Switch
as comapred to the clustered MTS.Now the only thing which comes to my mind is if
suppose theres a transaction going on one server and if suddenly that webserver
crashes then what will happen to that transaction is it that the transaction is
lost or the other webserver takes over that transaction.

Sridhar