Search box is the important stuff on website or blog especially blog with a lot of content, rather than search using page navigation it will be better if you provide search box to search specific post.
VisualSearch.js enhances ordinary search boxes with the ability to autocomplete faceted search queries. Specify the facets for completion, along with the completable values for any facet. You can retrieve the search query as a structured object, so you don’t have to parse the query string yourself.
Requirements: VisualSearch.js
Compatibility: All Modern Browsers
Demo: http://documentcloud.github.com/visualsearch/