Radio button validator

[PantherR]

How can I validate radio buttons? Because this won't work at all. The radio button \[code\]name\[/code\] and \[code\]ID\[/code\] is \[code\]billable\[/code\] and their \[code\]value\[/code\] is either \[code\]yes\[/code\] or \[code\]no\[/code\].\[code\]function formValidator() { var errors = new Array(); if($("#billable").checked == false) { errors[0] = "*Billable - Required"; } if(errors.length > 0) { var error_msg = 'Please review:'; for(i=0;i<errors.length;i++) { if(errors!=undefined) { error_msg = error_msg + "\n" + errors; } } alert(error_msg); return false; } return true; }\[/code\]