Need help! How can I auto populate the mailing address with the data in physical address?

Hi! I am new to using the abobe acrobat. Can anyone please help me how to autopopulate the mailing address with the data from the physical address just by checking the box indicated as same as physical address? I 've asked around from friends, they told me that I have to do a java script? I am totally lost. I don't know what that is. Can anyone please walk me through the process? Please, please help. Thank you very much!
