Create a button in post reply;

Hi, I want to know if its possible to create a button that can be used when replying to a post.

What i'm looking for probably can't be done though.

I want to find a way for people to be able to type a name into a text box (or something similar).

Then this button will search gatherer.wizards.com and provide a link to the card with that name, either with or without [ img ] tags.