Search with auto suggest in header

[eluser]Unknown[/eluser]
Hi everybody,

I'm building a website now, which has a search field in the header. When the user will press a key in the search input field, the possible results should be displayed automatically in a dropdown menu under the search field. These results will contain contain anchors. This should be done by using jQuery and AJAX.

I found a autosuggest-jquery-plugin here website. I want to implement it now but I still have some questions.

How should I use the MVC model to make this work?
Should I write jquery and ajax in the header, which acces a controller to get the result data?
Or is it allowed to do the result query in the header itself? That will be more easy.
I hope somebody can give me his opinion about this issue.

Thanks in advance,

Twan