哪位大哥帮我看一下这个正则表达式是什么意思
function AutoUrl(str)
on error resume next
Set url=new RegExp
url.IgnoreCase =True
url.Global=True
url.MultiLine = True
url.Pattern = "^(http://[A-Za-z0-9\./=\?%\-&_~`@:+!]+)"
str = url.Replace(str,"[url=$1]$1[/url]")
url.Pattern = "(http://[A-Za-z0-9\./=\?%\-&_~`@:+!]+)$"
str = url.Replace(str,"[url=$1]$1[/url]")
url.Pattern = "^(www.[A-Za-z0-9\./=\?%\-&_~`@:+!]+)"
str = url.Replace(str,"[url=http://$1]$1[/url]")
url.Pattern = "(www.[A-Za-z0-9\./=\?%\-&_~`@:+!]+)$"
str = url.Replace(str,"[url=http://$1]$1[/url]")
set url=Nothing
AutoUrl=str
end function