Hi everyone

I am a week old Javascript and PHP self learner and a bit confused.

I am trying to make a web application "Visitor Appointment System" with following features:
1. Receptionist/visitor will register visitor details and contact person.
2. There will be a dashboard what will list all active visitors for the day.
3. Visitors that had waited for more than 15 minutes will be highlighted. So there will be a minute counter visible in the dashboard for all users that will trigger the highlighting function.
4. Contact person from the whole company may put notes or accept the visitor.
5. Report to be generated every end of the week listing all visitors per day.

So here is my queries.
1. how/what to use for minute counter feature.
2. will I use javascript or php for this projects?

Your inputs are highly appreciated.
Thanks.