JavaScript for mobile

I need help with 2 simple script that mobile (Adobe reader) will recognise. I'm new to Java and if anyone could help me please?

Requirement.

Script 1) if date selection not equal to today date. Show pop up alert warning message.

Script 2) block selection of future date and display warning message

You need to ask program questions in the forum for the program you are using
To ask in the forum for your program please start at https://community.adobe.com/
Moving from Using the Community (which is about the forums) to the correct forum... Mod