Well, I realized that I posted my question in the wrong forum after everyone got confused as to what I was aiming at. (Available here)
I'll state my problem again: I have a search engine on my site that differentiates é from e and à from a, etc. The problem is that some of my visitors do not have the capability to make these special characters with their keyboards (and don't know the Alt numbers, or can't use them).
I would like people to be able to select a radio button and click on an 'Insert' button and the desired character will be added to the search field.