javascript Hide/show div on checkbox: checked/unchecked

Question

I am trying to make a function in javascript, that will hide / show particular div in my registration form, depending on the state of my checkbox (checked or not). Here is

Answer 1

You are correct in using display: none; to hide your DIV initially.

As for your checkbox, try removing the spaces between getELementById and ('powermail_field...

Also you need to change:

} else {elem.display:none;}

to:

} else {elem.display = 'none';}