studentPas,
так много букв, но так и непонятно ...
возможно вы это хотели ?
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script>
function sums(obj) {
var sum = 0,
i, inp = obj.querySelectorAll(':checked');
for (i = 0; i < inp.length; i++) {
var elem = inp[i];
sum += elem.value * (elem.name == "aa" ? .3 : .5);
}
obj.sumOut.value = sum.toFixed(1);
}
</script>
</head>
<body>
<form name="formText" onchange="sums(this)">
<input type="radio" name="aa" id="r1" value="1">
<input type="radio" name="aa" id="r2" value="2">
<input type="radio" name="aa" id="r3" value="3">
<input type="radio" name="aa" id="r4" value="4">
<input type="radio" name="aa" id="r5" value="5"><BR><BR>
<input type="radio" name="cc" id="r6" value="1">
<input type="radio" name="cc" id="r7" value="2">
<input type="radio" name="cc" id="r8" value="3">
<input type="radio" name="cc" id="r9" value="4">
<input type="radio" name="cc" id="r10" value="5"><BR><BR>
<INPUT type="reset" value="Reset">
<br>Result:<br>
<input type="text" name="sumOut" disabled="false" value="">
</form>
</body>
</html>