Validate multiple groups of radio buttons

function validateit() {
var q1 = document.formname.elements["q1"];
 for (var i=0; i <q1.length; i++) {
  if (q1[i].checked==true) {
alert("Answered!");
return false;
  }

 }
alert("Answer all questions");
return false;

}

<form onsubmit="return validateit()">
<input type='radio' name='q1' value='a'>
<input type='radio' name='q1' value='b'>
<input type='radio' name='q1 value='c'>

<input type='radio' name='q2' value='a'>
<input type='radio' name='q2' value='b'>
<input type='radio' name='q2 value='c'>

<input type='radio' name='q3' value='a'>
<input type='radio' name='q3' value='b'>
<input type="submit">
</form>

var RadNames=['q1','q2','q3','q4','q5','q6','q7','q8'];
// Radio buttons with the same name form an array
// This is one simple method of checking the objjects in each group array
function Validate(){
var zxcmess=[];
for (var zxc0=0;zxc0<RadNames.length;zxc0++){
var radobjs=document.frm1.elements[RadNames[zxc0]];
var val=false;
for (var zxc1=0;zxc1<radobjs.length;zxc1++){
if (radobjs[zxc1].checked){
val=true;
}
}
if (!val){
zxcmess.push('Please answer question '+(radobjs[0].title||radobjs[0].name));
}
}
if (zxcmess.length>0){
alert(zxcmess.join('\n'));
return false;
}
return true;
}