上面是一些代码,比如if*******thenDimrs666,sql666Setrs666=Server.CreateObject("ADODB.RecordSet")sql666="SELECT*FROM表名WHERE字段名like'"&Request.Form("字段名")&"'"rs666.Opensql666,conn,1,1IfNotrs666.EofThenresponse.Write"<scriptlanguage=javascript>alert('数据重复');history.go(-1);</script>"else下面是一些插入代码