Attempt to fix an issue discovered in IE browsers where radio buttons fail checkValidation() even if one sibling is checked.

Adding a method to check if a sibling of a checkbox/radio button is checked then the others required elements should validate to true. Issue Exists in IE 7, 8, 9 . Where 2 required radio buttons with the same name, if one is checked the other fails the validation.

Thanks for this nice tool by the way we are using it in production @dred.com.

If you think there is a better way to do things let me know.

Redian