In particular, your display name must be a first and a last name separated by a space character, and must not be obviously fictitious.
Please do not use IM lingo in our forum, please do not demand stuff. This forum is not a code generator for you. It is here to help you learn. Also you title of this post is not very helpfull. Radio Button tells me nothing!
I think you need to learn if statements and document.forms.elementName.disabled = "true|false";
Handle the above in the on click of the radio buttons. And yes satou is right, how will you click on radio2 once you have clicked on radio1 since it gets disabled. anyway try the above and see if it works for you.
Life called,so here I am.<br />Cheers<br />Niki.:-)