How do I tell if my radio button is checked using id's?

How do I tell if my radio button is checked using id's?

I've been trying this:

Javascript code:

if(document.getElementById('radio1').checked == 1)
{
  //code here
}

Code (markup):

But it keeps on unchecking the buttons everytime I check them.

Please help!

~imozeb

 

Try

if (document.getElementById('radio1').checked)

 

nvm. Got it!