Asp常用函数有哪些？

'===textarea显示用===
function htmlencode1(fString)
if fString<>"" and not isnull(fString) then
fString = replace(fString, "&gt;", ">")
fString = replace(fString, "&lt;", "<")
fString = Replace(fString, "&nbsp;", chr(32))
fString = Replace(fString, "</p><p>", CHR(10) & CHR(10))
fString = Replace(fString, "<br>", CHR(10))
htmlencode1=fString
else
htmlencode1=""
end if
end function


'===页面显示用===
function htmlencode2(fString)
if fString<>"" and not isnull(fString) then
fString = replace(fString, ">", "&gt;")
fString = replace(fString, "<", "&lt;")
fString = Replace(fString, chr(32), "&nbsp;")
fString = Replace(fString, CHR(10) & CHR(10), "</p><p>")
fString = Replace(fString, CHR(10), "<br>")
htmlencode2=fString
else
htmlencode2=""
end if
end function

'===取出指定字符串前后的字符串方法===
function GetStrs(str1,CharFlag,Dflag)
dim tmpstr
if Dflag=0 then'取左
pos1=instr(str1,charFlag)
if pos1<=20 then
tmpstr=left(str1,pos1-1)
else
tmpstr=mid(str1,pos1-20,20)
end if
else '取右
pos1=instr(str1,charFlag)+len(charFlag)
if len(str1)-pos1<=20 then
tmpstr=right(str1,len(str1)-pos1)
else
tmpstr=mid(str1,pos1+1,20)
end if
end if
GetStrs=tmpstr
end function

'===取出文件名===
function getfilename(str)
pos=instr(str,".")
if str<>"" then
str=mid(str,pos,len(str))
end if
getfilename=str
end function

'===取到浏览器版本转换字符串===
function browser()
dim text
text = Request.ServerVariables("HTTP_USER_AGENT")
if Instr(text,"MSIE 5.5")>0 then
browser="IE 5.5"
elseif Instr(text,"MSIE 6.0")>0 then
browser="IE 6.0"
elseif Instr(text,"MSIE 5.01")>0 then
browser="IE 5.01"
elseif Instr(text,"MSIE 5.0")>0 then
browser="IE 5.00"
elseif Instr(text,"MSIE 4.0")>0 then
browser="IE 4.01"
else
browser="未知"
end if
end function

'===取到系统脚本转换字符串===
function system(text)
if Instr(text,"NT 5.1")>0 then
system=system+"Windows XP"
elseif Instr(text,"NT 5")>0 then
system=system+"Windows 2000"
elseif Instr(text,"NT 4")>0 then
system=system+"Windows NT4"
elseif Instr(text,"4.9")>0 then
system=system+"Windows ME"
elseif Instr(text,"98")>0 then
system=system+"Windows 98"
elseif Instr(text,"95")>0 then
system=system+"Windows 95"
else
system=system+"未知"
end if
end function
'====删除文件===
function delfile(filepath)
imangepath=trim(filepath)
path=server.MapPath(imangepath)
SET fs=server.CreateObject("Scripting.FileSystemObject")
if FS.FileExists(path) then
FS.DeleteFile(path)
end if
set fs=nothing
end function

'===得到真实的客户端IP===
Public Function GetClientIP()
dim uIpAddr
' 本函数参考webcn.Net/AspHouse 文献<取真实的客户IP>
uIpAddr = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
If uIpAddr = "" Then uIpAddr = Request.ServerVariables("REMOTE_ADDR")
GetClientIP = uIpAddr
uIpAddr = ""
End function