http://jsfiddle.net/jngpjbjm/

Have a look at the fiddle link attached. Radio button value is returning a undefined value. I don't why. Please help with this.

<input type=radio name=arv value=1>1

<br>

<input type=radio name=arv value=2>2



var radio = document.getElementsByName('arv');

radio[0].addEventListener('click', check());

radio[1].addEventListener('click', check());



function check() {

for (var i = 0; i < radio.length; i++) {

    var rcheck = radio[i].checked;

    if (!rcheck) {

        alert(rcheck.value);



    }



}

}