[otrs] make freetext box behave like the "From" box

Hello there, Our customers love the way the "From" textbox works, like a browser address bar, showing you all options that matches what you're typing, nice! It's so nice that they'd love to have the same behavior on a freetext field. Has anyone accomplished this? Is it possible? Thanks for your answers, Leonardo Certuche www.itconsultores.com.co