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if request.Form("UserID")<>"" and request.Form("PWD")<>"" thensession("UserID")=replace(request.Form("UserID"),"'","''")session("PWD")=replace(request.Form("PWD"),"'","''")sql="select ID,PWD from dbo.Tab_Student where ID='"&session("UserID")&"'"set rs=conn.execute(sql)if rs.eof then %><script language="javascript">alert("您输入的学生证号错误，请重新输入！");history.back();</script><%session.Abandon() '删除所有存在Session对象中的对象elseifrs("PWD")=session("PWD") thensession("flag")="登录"%><script language="javascript">alert("您已经成功登录！");window.location.href="default.asp";</script><%else%><script language="javascript">alert("您输入的密码错误，请重新输入！");history.back();</script><%session.Abandon()end ifend if">