I'm not sure if I understand your question fully. However, as you appear to be using hyperref, why don't you provide a note or url field (or whatever field type is most appropriate for your bibliographic entry) that contains something like
"Available online at \url{http://www.mysite.mycountry/xyz.html}"
or, if you want to to use the \href command,
"Available online at \href{http://www.mysite.mycountry/xyz.html}{this site}"
Addendum: Please note that this solution works with both bibtex and biblatex. However, far more elegant solutions are available with biblatex. See for instance, on pp.8 f. of the biblatex manual, a discussion of the entry type online, "intended for sources such as web sites which are intrinsicly online resources." Also, all biblatex entry types support the field url.