if bh="" then
sql="select * from sl where bh like '%"&ss&"%'"
  else
bh=clng(bh)
sql="select * from sl where bh=" & bh & " "
end if
  if nam<>"" then
  sql=sql&" and nam like '%"&nam&"%' "
end if
  if jz<>"" then
sql=sql&" and jz like '%"&jz&"%' "
end if
if pc<>"" then
pc=cint(pc)
  sql=sql&" and pc="&pc&" "
  end if
  if zw<>"" then
  sql=sql&" and zw like '%"&zw&"%' "
end if