uBB函数，求助。解释一下这三个函数分别实现的是什么功能，怎样用，详细点，答完给分，在线等。。。急，不甚感激。。。
function ubb(content) ubb=content
nowtime=now()
UBB=Convert(ubb,"code")
UBB=Convert(ubb,"html")
UBB=Convert(ubb,"url")
UBB=Convert(ubb,"color")
UBB=Convert(ubb,"font")
UBB=Convert(ubb,"size")
UBB=Convert(ubb,"quote")
UBB=Convert(ubb,"email")
UBB=Convert(ubb,"img")
UBB=Convert(ubb,"swf")
ubb=convert(ubb,"cen")
ubb=convert(ubb,"rig")
ubb=convert(ubb,"lef")
ubb=convert(ubb,"center")
UBB=AutoURL(ubb)
ubb=replace(ubb,"","<b>",1,-1,1)
ubb=replace(ubb,"","</b>",1,-1,1)
ubb=replace(ubb,"","<i>",1,-1,1)
ubb=replace(ubb,"","</i>",1,-1,1)
ubb=replace(ubb,"","<u>",1,-1,1)
ubb=replace(ubb,"","</u>",1,-1,1)
ubb=replace(ubb,"[blue]","<font color='#000099'>",1,-1,1)
ubb=replace(ubb,"[/blue]","</font>",1,-1,1)
ubb=replace(ubb,"[red]","<font color='#990000'>",1,-1,1)
ubb=replace(ubb,"[/red]","</font>",1,-1,1)
for i=1 to 28
ubb=replace(ubb,"{:em"&i&"}","<IMG SRC=emot/emotface/em"&i&".gif ></img>",1,6,1)
ubb=replace(ubb,"{:em"&i&"}","",1,-1,1)
next
ubb=replace(ubb,"["&chr(176),"[",1,-1,1)
ubb=replace(ubb,chr(176)&"]","]",1,-1,1)
ubb=replace(ubb,"/"&chr(176),"/",1,-1,1)
'ubb=replace(ubb,"{;em","{:em",1,-1,1)
end function
function Convert(ubb,CovT) cText=ubb
startubb=1
do while Covt="url" or Covt="color" or Covt="font" or Covt="size"
startubb=instr(startubb,cText,"["&CovT&"=",1)
if startubb=0 then exit do
endubb=instr(startubb,cText,"]",1)
if endubb=0 then exit do
Lcovt=Covt
startubb=startubb+len(lCovT)+2
text=mid(cText,startubb,endubb-startubb)
codetext=replace(text,"[","["&chr(176),1,-1,1)
codetext=replace(codetext,"]",chr(176)&"]",1,-1,1)
'codetext=replace(codetext,"{:em","{;em",1,-1,1)
codetext=replace(codetext,"/","/"&chr(176),1,-1,1)
select case CovT
case "color"
cText=replace(cText,"[color="&text&"]","<font color='"&text&"'>",1,1,1)
cText=replace(cText,"[/color]","</font>",1,1,1)
case "font"
cText=replace(cText,"[font="&text&"]","<font face='"&text&"'>",1,1,1)
cText=replace(cText,"[/font]","</font>",1,1,1)
case "size"
if IsNumeric(text) then
if text>6 then text=6
if text<1 then text=1
cText=replace(cText,"[size="&text&"]","<font size='"&text&"'>",1,1,1)
cText=replace(cText,"[/size]","</font>",1,1,1)
end if
case "url"
cText=replace(cText,"[url="&text&"]","<a href='"&codetext&"' target=_blank>",1,1,1)
cText=replace(cText,"[/url]","</a>",1,1,1)
case "email"
cText=replace(cText,"["&CovT&"="&text&"]","<a href=mailto:"&text&">",1,1,1)
cText=replace(cText,"[/"&CovT&"]","</a>",1,1,1)
end select
loop
startubb=1
do
startubb=instr(startubb,cText,"["&CovT&"]",1)
if startubb=0 then exit do
endubb=instr(startubb,cText,"[/"&CovT&"]",1)
if endubb=0 then exit do
Lcovt=Covt
startubb=startubb+len(lCovT)+2
text=mid(cText,startubb,endubb-startubb)
codetext=replace(text,"[","["&chr(176),1,-1,1)
codetext=replace(codetext,"]",chr(176)&"]",1,-1,1)
'codetext=replace(codetext,"{:em","{;em",1,-1,1)
codetext=replace(codetext,"/","/"&chr(176),1,-1,1)
select case CovT
case "center"
cText=replace(cText,"[center]","<div align='center'>",1,1,1)
cText=replace(cText,"[/center]","</div>",1,1,1)
case "url"
cText=replace(cText,"["&CovT&"]"&text,"<a href='"&codetext&"' target=_blank>"&codetext,1,1,1)
cText=replace(cText,"<a href='"&codetext&"' target=_blank>"&codetext&"[/"&CovT&"]","<a href="&codetext&" target=_blank>"&codetext&"</a>",1,1,1)
case "email"
cText=replace(cText,"["&CovT&"]","<a href=mailto:"&text&">",1,1,1)
cText=replace(cText,"[/"&CovT&"]","</a>",1,1,1)
case "html"
codetext=replace(codetext,"<br>",chr(13),1,-1,1)
codetext=replace(codetext," ",chr(32),1,-1,1)
Randomize
rid="temp"&Int(100000 * Rnd)
cText=replace(cText,"[html]"&text,"代码片断如下：<TEXTAREA id="&rid&" rows=15 style='width:100%' class='bk'>"&codetext,1,1,1)
cText=replace(cText,"代码片断如下：<TEXTAREA id="&rid&" rows=15 style='width:100%' class='bk'>"&codetext&"[/html]","代码片断如下：<TEXTAREA id="&rid&" rows=15 style='width:100%' class='bk'>"&codetext&"</TEXTAREA><INPUT onclick=runEx('"&rid&"') type=button value=运行此段代码 name=Button1 class='Tips_bo'> <INPUT onclick=JM_cc('"&rid&"') type=button value=复制到我的剪贴板 name=Button2 class='Tips_bo'>",1,1,1)
case "img" '一般显示的图片
cText=replace(cText,"[img]"&text,"<a href="&chr(34)&"about:<img src="&codetext&" border=0>"&chr(34)&" target=_blank><img src="&codetext ,1,1,1 )
cText=replace(cText,"[/img]"," vspace=2 hspace=2 border=0 alt=::点击图片在新窗口中打开:: onload='javascript:if(this.width>580)this.width=580'></a>",1,1,1)
case "cen" '图片居中
cText=replace(cText,"[cen]"&text,"<table border='0' align='center' cellpadding='0' cellspacing='0'><tr><td > <a href="&chr(34)&"about:<img src="&codetext&" border=0>"&chr(34)&" target=_blank><img src="&codetext ,1,1,1 )
cText=replace(cText,"[/cen]"," vspace=2 hspace=2 border=0 alt=::点击图片在新窗口中打开:: onload='javascript:if(this.width>580)this.width=580'></a></td></tr></table>",1,1,1)
case "rig" '图片居右,文字绕排
cText=replace(cText,"[rig]"&text,"<a href="&chr(34)&"about:<img src="&codetext&" border=0>"&chr(34)&" target=_blank><img src="&codetext ,1,1,1 )
cText=replace(cText,"[/rig]"," vspace=2 hspace=2 border=0 align='right' alt=::点击图片在新窗口中打开:: onload='javascript:if(this.width>580)this.width=580'></a>",1,1,1)
case "lef" '图片居左,文字绕排
cText=replace(cText,"[lef]"&text,"<a href="&chr(34)&"about:<img src="&codetext&" border=0>"&chr(34)&" target=_blank><img src="&codetext ,1,1,1 )
cText=replace(cText,"[/lef]"," vspace=2 hspace=2 border=0 align='left' alt=::点击图片在新窗口中打开:: onload='javascript:if(this.width>580)this.width=580'></a>",1,1,1)
case "code"
cText=replace(cText,"","以下内容为程序代码<hr noshade>"&codetext&"<hr noshade>",1,1,1)
case "quote"
atext=replace(text,"[cen]","",1,-1,1)
atext=replace(text,"[/cen]","",1,-1,1)
atext=replace(text,"[img]","",1,-1,1)
atext=replace(atext,"[/img]","",1,-1,1)
atext=replace(atext,"[swf]","",1,-1,1)
atext=replace(atext,"[/swf]","",1,-1,1)
atext=replace(atext,"[html]","",1,-1,1)
atext=replace(atext,"[/html]","",1,-1,1)
'atext=replace(atext,"{:em","{;em",1,-1,1)
atext=Splitzf11_gb(atext,350)
atext=replace(atext,chr(32)," ",1,-1,1)
cText=replace(cText,"
loop
AutoURL=cText
end function
%>
问题：三个函数分别实现的是什么功能，怎样用，详细点。关键的地方解释一下。
[解决办法]
有什么问题？不就是UBB转换的代码，不过些的比较冗余
[解决办法]
