findyear=request.form("findyear")
findmonth=request.form("findmonth")
findbrand=request.form("findbrand")
Set rs = Server.CreateObject ("ADODB.Recordset")
if isnull(findyear) and findmonth=0 and findbrand=0 then
sql="select * from nomad" else
response.write (findyear)
end if   
请问各高人，，这个语句有错吗  
调错出错  参数类型不正确 的错误  
把判断语句注掉就正常