I am trying to copy info from a group of coloumns to a next group of coloumns using a check box. If the user uncheck the check box the coloumns that I copy to would be clear so the user can enter a differentset of info into the colounms.
this is a html form
1. How can I do this
2. what language should I use java script or php to do this
3. can I get some code example.