No, because webspiders can't see javascripts they will see something like <script src="http://external-site.com/script.js"> and they won't care about it Usually search engines don't care about javascripts, ajax, iframes and all those stuff...because is very hard for them to read theyre content, and is useless. why should a search engine read a content that is an IFRAME and taken from anather website? as yahoo or msn? it can read it directly from Yahoo/MSN no ?!