Script for monitor blocking in SQL Server

select loginame,cpu,memusage,physical_io,* from master..sysprocesses a where exists ( select b.* from master..sysprocesses b where b.blocked > 0 and b.blocked = a.spid ) and not exists ( select b.* from master..sysprocesses b where b.blocked > 0 and b.spid = a.spid )order by spid