强制刷新网页

＜% '强制性刷新随机验证码 '让随机验证码每次按IE的后退按钮时，返回登录页面的随即码都自动刷新， Response.expires=-1 Response.AddHeader"pragma","no-cache" Response.AddHeader"cache-control","no-store" %＞

判断文件地址是否有效

＜% Response.Write("") On Error Resume Next Dim thisurl,thistext thisurl=Request("thisurl") '定义文件地址(非Html格式文档)! if thisurl="" then Response.Write("请先输入文件地址!") Response.End End if Function objxmlhttp(xmlurl) On Error Resume Next Set objxml = CreateObject("Microsoft.XMLHTTP") objxml.Open "get",xmlurl,false objxml.setrequestheader "content-type","application/x-www-form-urlencoded" objxml.send objxmlhttp = objxml.responsebody if Err then Err.Clear Response.Write("建立连接失败,文件不存在或网络有问题!;错误原因:"&Err.Description&"！") Response.End End if End Function Function bytes2BSTR(vIn) strReturn = "" For i = 1 To LenB(vIn) ThisCharCode = AscB(MidB(vIn,i,1)) If ThisCharCode < &H80 Then strReturn = strReturn & Chr(ThisCharCode) Else NextCharCode = AscB(MidB(vIn,i+1,1)) strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode)) i = i + 1 End If Next bytes2BSTR = strReturn End Function thisurl2=Split(thisurl,",") For Each ii In thisurl2 thistext=bytes2BSTR(objxmlhttp(ii)) if InStr(thistext,"")<>0 then Response.Write(""& ii &" × ") Else Response.Write(""& ii &" √ ") End if Next if Err then Err.Clear Response.Write("碰到意外!;错误原因:"&Err.Description&"！") Response.End End if %＞

以上就是ASP强制刷新网页和判断文件地址实例代码，希望对大家的学习有所帮助。