用asp实现网址和邮件地址的转换函数

网址和邮件地址的转换函数
<%
function URLconvert(str) 
convertstr=str
urlLocation=instr(convertstr,"http://")

if (urlLocation=0) and (mailLocation=0) then 
URLconvert=convertstr
exit function
end if

if urlLocation<>0 then
rightstr=str
Do while urlLocation<>urlLocationend
urlLocation=instr(rightstr,"http://")
urlLocationend=InStrRev(rightstr,"http://")
finalstr=finalstr&left(rightstr,urlLocation-1)
midurlstr=mid(rightstr,urlLocation+1,1)
do while (asc(midurlstr)>=45) and (asc(midurlstr)<=126)
loopint=loopint+1
midurlstr=mid(rightstr,urlLocation+loopint,1)
if midurlstr="" then exit do
loop
endURLstr=mid(rightstr,urllocation,loopint)
URLstr="<a href="&endURLstr&">"&endURLstr&"</a>"
rightstr=mid(rightstr,urllocation+loopint)
finalstr=finalstr&URLstr
loopint=1
Loop 
end if
finalstr=finalstr&rightstr

convertstr1=finalstr
finalstr=""
mailLocation=instr(convertstr1,"@")
if mailLocation<>0 then
Do while mailLocation<>mailLocationend
mailLocation=instr(convertstr1,"@")
mailLocationend=InStrRev(convertstr1,"@")
mainmidmailstr=mid(convertstr1,mailLocation+1,1)
midmailstr=mainmidmailstr
do while (asc(midmailstr)>=45) and (asc(midmailstr)<=126)
loopint1=loopint1+1
midmailstr=mid(convertstr1,mailLocation-loopint1,1)
loop
firstSTR=mid(convertstr1,mailLocation-loopint1+1,loopint1-1)

finalstr=finalstr&left(convertstr1,mailLocation-loopint1)

midmailstr1=mainmidmailstr 
do while (asc(midmailstr1)>=45) and (asc(midmailstr1)<=126)
loopint2=loopint2+1
midmailstr1=mid(convertstr1,mailLocation+loopint2,1)
if midmailstr1="" then exit do
loop
secondSTR=mid(convertstr1,mailLocation,loopint2)

endmailstr=firstSTR&secondSTR
mailstr="<a href=mailto:"&endmailstr&">"&endmailstr&"</a>"
finalstr=finalstr&mailstr
convertstr1=mid(convertstr1,maillocation+loopint2)
loopint1=1
loopint2=1
Loop
end if
finalstr=finalstr&convertstr1
URLconvert=finalstr
end function
%>