Tinymce url needs to be versatile

Tinymce url needs to be versatile

I need relative path in links which don't have full url and i don't need
relative path in url which have full url.
When i insert in tinymce:
1. I need full url(non-relative path) in:
"http://dignepal.com/images/logo.png"
2. But i don't need full url (relative path) in: "javascript:"
While initializing tinymce i am currently using relative_urls as false and
it is causing problem in number 2 problem as mentioned above. And main
problem is i need it in same page and in same textarea.