I am a UI designer and website designer for last 3 years. This seems a simple work using a JQuery, but what looks simple requires precision. The main task is to implement the design in the existing code which requires a bit carefulness. So I can do this in an hour but needs some time to test and merge with the existing design. 3 days are for the safer side and also I have to do it part-time taking some time out of my regular job. Will definitely try to finish it by tomorrow, but why make a promise if you can do that positively.