ผมส่งค่าจาก radio เข้าสคริปไม่ทำงานครับ หรือว่าผมทำผิดครับ

<script type="text/javascript"><!--
						 
var total = 0;
function getValues() {
var qty = 0;
var rate = 0;

var obj = document.getElementsByTagName("input");
      for(var i=1; i<obj.length; i++){
         if(obj[i].name == "qty[]"){var qty = obj[i].value;}
         if(obj[i].name == "rate[]"){var rate = obj[i].value;}
		   if(obj[i].name == "mmake[]"){var mmake = obj[i].value;}
         if(obj[i].name == "amt[]"){
          		if(qty > 0 && rate > 0  && mmake >0 ){obj[i].value = qty-rate-mmake;total+=(obj[i].value*1);}
          				else{obj[i].value = 0;total+=(obj[i].value*1);}
          		}
         	 }
        document.getElementById("total").value = total*1;
        total=0;
}


var gFiles = 1;
function addFile() {
var li = document.createElement('li');
li.setAttribute('id', 'file-' + gFiles);
li.innerHTML = '<input type="text" name="name[]"><input type="text" name="qty[]"   value="<? echo $rm; ?>" size="5" /><input type="text" name="rate[]" size="5" onkeyup="getValues()"> <input type="radio" name="mmake[]" value="1"  onclick="getValues(1)"  /> THB.<input type="radio" name="mmake[]" value="2"  onclick="getValues(2)"  />%=<input type="text" name="amt[]" size="10"><span onclick="removeFile(\'file-' + gFiles + '\')" style="cursor:pointer;color:red">x</span>';
document.getElementById('files-root').appendChild(li);
gFiles++;
}
function removeFile(aId) {
var obj = document.getElementById(aId);
obj.parentNode.removeChild(obj);
}
--></script>

<ol id="files-root">
<li><input type="text" name="name[]"><input type="text" name="qty[]"   value="<? echo $rm; ?>" size="5" /><input name="rate[]" type="text" size="5" onkeyup="getValues()"> <input type="radio" name="mmake[]" value=""  onclick="getValues()"  />
THB.
  <input type="radio" name="mmake[]" value=""  onclick="getValues()"  />
  %=
  <input name="amt[]" type="text" size="5">
</ol>
<span onclick="addFile()" style="cursor:pointer;">Add</span>