The form property references the Form object that contains the Radio box.
<html> <head> <title> Example of the radio form property</title> </head> <body> <form name="form1"> <input type="radio" name=button1>Box 1 <br> <input type="radio" name=button2>Box 2 <br><br> <input type="button" value="Get Form Name" onClick='alert("The form name is: " + document.form1.button1.form.name)'> </form> </body> </html>
