It's neat. I do recommend you make some rules about when to fire off the ajax request. On every keypress/keyup/focus is a bit much because you're making necess

It's neat. I do recommend you make some rules about when to fire off the ajax request. On every keypress/keyup/focus is a bit much because you're making necessary requests even if the value didn't change. Maybe make a cache that remembers the last search term.