function AddSiteURL(ByVal Str)
If IsNull(Str) Then
AddSiteURL = ""
Exit Function
End If

Dim re
Set re=new RegExp
With re
.IgnoreCase =True
.Global=True

.Pattern="<img (.*?)src=""(?!(http|https)://)(.*?)"""
str = .replace(str,"<img $1src=""" & SiteURL & "$3""")

.Pattern="<a (.*?)href=""(?!(http|https|ftp|mms|rstp)://)(.*?)"""
str = .replace(str,"<a $1href=""" & SiteURL & "$3""")
End With
Set re=Nothing

AddSiteURL=Str
End Function