ASP常用函数收藏

************************************
@#取得IP地址
@#************************************
Function Userip()
Dim GetClientIP
@#如果客户端用了代理服务器，则应该用ServerVariables("HTTP_X_FORWARDED_FOR")方法
GetClientIP = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
If GetClientIP = "" or isnull(GetClientIP) or isempty(GetClientIP) Then
@#如果客户端没用代理，应该用Request.ServerVariables("REMOTE_ADDR")方法
GetClientIP = Request.ServerVariables("REMOTE_ADDR")
end if
Userip = GetClientIP
End function

@#************************************
@#转换IP地址
@#************************************
function cip(sip)
tip=cstr(sip)
sip1=left(tip,cint(instr(tip,".")-1))
tip=mid(tip,cint(instr(tip,".")+1))
sip2=left(tip,cint(instr(tip,".")-1))
tip=mid(tip,cint(instr(tip,".")+1))
sip3=left(tip,cint(instr(tip,".")-1))
sip4=mid(tip,cint(instr(tip,".")+1))
cip=cint(sip1)*256*256*256+cint(sip2)*256*256+cint(sip3)*256+cint(sip4)
end function

@#************************************
@# 弹出对话框
@#************************************
Sub alert(message)
message = replace(message,"@#","\@#")
Response.Write ("<script>alert(@#" & message & "@#)</script>")
End Sub

@#************************************
@# 返回上一页，一般用在判断信息提交是否完全之后
@#************************************
Sub GoBack()
Response.write ("<script>history.go(-1)</script>")
End Sub

@#************************************
@# 重定向另外的连接
@#************************************
Sub Go(url)
Response.write ("<script>location.href(@#" & url & "@#)</script>")
End Sub

@#************************************
@# 指定秒数重定向另外的连接
@#************************************
sub GoPage(url,s)
s=s*1000
Response.Write "<SCRIPT LANGUAGE=javascript>"
Response.Write "window.setTimeout("&chr(34)&"window.navigate(@#"&url&"@#)"&chr(34)&","&s&")"
Response.Write "</script>"
end sub

@#************************************
@# 判断数字是否整形
@#************************************
function isInteger(para)
on error resume next
dim str
dim l,i
if isNUll(para) then
isInteger=false
exit function
end if
str=cstr(para)
if trim(str)="" then
isInteger=false
exit function
end if
l=len(str)
for i=1 to l
if mid(str,i,1)>"9" or mid(str,i,1)<"0" then
isInteger=false
exit function
end if
next
isInteger=true
if err.number<>0 then err.clear
end function

@#************************************
@# 获得文件扩展名
@#************************************
function GetExtend(filename)
dim tmp
if filename<>"" then
tmp=mid(filename,instrrev(filename,".")+1,len(filename)-instrrev(filename,"."))
tmp=LCase(tmp)
if instr(1,tmp,"asp")>0 or instr(1,tmp,"php")>0 or instr(1,tmp,"php3")>0 or instr(1,tmp,"aspx")>0 then
getextend="txt"
else
getextend=tmp
end if
else
getextend=""
end if
end function

@# *-------------------------------------------
@# * 函数：CheckIn
@# * 描述：检测参数是否有SQL危险字符
@# * 参数：str要检测的数据
@# * 返回：FALSE：安全 TRUE：不安全
@# * 作者：
@# * 日期：
@# *-------------------------------------------
function CheckIn(str)
if instr(1,str,chr(39))>0 or instr(1,str,chr(34))>0 or instr(1,str,chr(59))>0 then
CheckIn=true
else
CheckIn=false
end if
end function

@# *-------------------------------------------
@# * 函数：HTMLEncode
@# * 描述：过滤HTML代码
@# * 参数：--
@# * 返回：--
@# * 作者：
@# * 日期：
@# *-------------------------------------------
function HTMLEncode(fString)
if not isnull(fString) then
fString = replace(fString, ">", "&gt;")
fString = replace(fString, "<", "&lt;")

fString = Replace(fString, CHR(32), "&nbsp;")
fString = Replace(fString, CHR(9), "&nbsp;")
fString = Replace(fString, CHR(34), "&quot;")
fString = Replace(fString, CHR(39), "&#39;")
fString = Replace(fString, CHR(13), "")
fString = Replace(fString, CHR(10) & CHR(10), "</P><P> ")
fString = Replace(fString, CHR(10), "<BR> ")

HTMLEncode = fString
end if
end function

@# *-------------------------------------------
@# * 函数：HTMLcode
@# * 描述：过滤表单字符
@# * 参数：--
@# * 返回：--
@# * 作者：
@# * 日期：
@# *-------------------------------------------
function HTMLcode(fString)
if not isnull(fString) then
fString = Replace(fString, CHR(13), "")
fString = Replace(fString, CHR(10) & CHR(10), "</P><P>")
fString = Replace(fString, CHR(34), "")
fString = Replace(fString, CHR(10), "<BR>")
HTMLcode = fString
end if
end function

原文转自：http://www.ltesting.net