Multiple Row Auto Calculation and CheckBox

[devil_vin]

Hi...guys!I have a multiple row table,the structure as declared below.

<table id ="claim_dtl">
<form name="claim_dtl">
<tr>
<td><input name="trainingCost" rel="calculate_input" type="text" size="5" /></td>
 <td ><input name="travelCost" rel="calculate_input" type="text" size="7" /></td>
<td ><input name="entCost" rel="calculate_input" type="text" size="5" /></td>
  <td><input name="miscCost" rel="calculate_input" type="text" size="5" /></td>
<td><input type="checkbox" name="fc" value="checkbox" /></td>
<td><input name="subTotalRM" rel="calculate_output_rm" type="text" size="5" disabled="disabled" /></td>
<td><input name="subTotalFC" rel="calculate_output_fc" type="text" size="10" disabled="disabled" /></td> 
 </tr>
<tr>
<td><input name="trainingCost" rel="calculate_input" type="text" size="5" /></td>
 <td ><input name="travelCost" rel="calculate_input" type="text" size="7" /></td>
<td ><input name="entCost" rel="calculate_input" type="text" size="5" /></td>
  <td><input name="miscCost" rel="calculate_input" type="text" size="5" /></td>
<td><input type="checkbox" name="fc" value="checkbox" /></td>
<td><input name="subTotalRM" rel="calculate_output_rm" type="text" size="5" disabled="disabled" /></td>
<td><input name="subTotalFC" rel="calculate_output_fc" type="text" size="10" disabled="disabled" /></td> 
 </tr>
<tr>
 <td><input name="totalRM" id ="totalRM" type="text" size="5" disabled="disabled" /></td>
<td><input name="totalFC" id ="totalFC" type="text" size="10" disabled="disabled" /></td>
</tr>
</form>
</table>

I need the summation of "calculate_input" to be displayed at the subTotalFC field if checkbox is checked rather than subTotalRM field which I have already implemented it.And also the summation of subTotalFC to be displayed at totalFC field.

Here is the function for auto calculation:

function setupAutoCalc() {
	var table = document.getElementById("claim_dtl");
    if(!table) {  
		alert("Error:No table found!");
        return;
    }
    if(table.tBodies.length == 0) {
		alert("Error:No row found!");
        return;
    }            
                
	for(var i = 0; i < table.tBodies[0].rows.length; i++) {
		var inputs = table.tBodies[0].rows[i].getElementsByTagName("input");
		for(var inp = 0; inp < inputs.length; inp++) {
			if(inputs[inp].getAttribute("rel") == "calculate_input") {
				inputs[inp].onkeyup = function() {
					var tmp = this;
					while(tmp.nodeName != "TR")
						tmp = tmp.parentNode;
					autocalc(tmp, this);
				}
			}
		}
	}
}

function autocalc(row, v) {
	if(isNaN(v.value)) {
		alert("Please enter number only");
		v.value = "";
		return;
	}
else
    if(v.value == 0) {
		alert("Please enter number greater than zero only");
		v.value = "";
		return;
    }
	// if(document.claim_dtl.fc.checked == false) {
		var tmp= row.getElementsByTagName("input");
		var inputs = new Array();
		var output = false;
	
		for(var i = 0;i<tmp.length;i++) {
			if(tmp[i].getAttribute("rel") == "calculate_output_rm") 
				output = tmp[i];
         else
				inputs[inputs.length] = tmp[i];
       }
       if(!output) {
			alert("Error:No output calculated");
			return;
       }

		var subTotal = 0;
		for(var i = 0;i < inputs.length; i++) {
			var val = Number(inputs[i].value);
			var num = Math.round(val*Math.pow(10,2)) / Math.pow(10,2);
			if(!isNaN(num))
				subTotal += num; 
        }
        output.value = subTotal; // subtotal of RM

        tmp = row.parentNode.getElementsByTagName("input");
        var total = 0;
		for (var i = 0; i < tmp.length; i++) {
			if (tmp[i].getAttribute("rel") === "calculate_output_rm") {
                var val = Number(tmp[i].value);
                var num = Math.round(val * 100) / 100;
			    if(!isNaN(num)) {
                       total += num; 
               }
           }
       }
       var totalRM = document.getElementById("totalRM");
	   totalRM.value = total; // total of RM
    // }

	if(document.claim_dtl.fc.checked == true) {
		 tmp= row.getElementsByTagName("input");
	
		 for(var i = 0;i<tmp.length;i++) {
			if(tmp[i].getAttribute("rel") == "calculate_output_fc") 
				output = tmp[i];
           else
				inputs[inputs.length] = tmp[i];
	   }
	   if(!output) {
			alert("Error:No output calculated");
			return;
       }

       subTotal = 0;
       for(var i = 0;i < inputs.length; i++) {
			var val = Number(inputs[i].value);
			var num = Math.round(val*Math.pow(10,2)) / Math.pow(10,2);
			if(!isNaN(num))
				subTotal += num; 
      }
      output.value = subTotal; // subtotal of FC

     tmp = row.parentNode.getElementsByTagName("input");
          total = 0;
		for (var i = 0; i < tmp.length; i++) {
			if (tmp[i].getAttribute("rel") === "calculate_output_fc") {
                var val = Number(tmp[i].value);
                var num = Math.round(val * 100) / 100;
			    if(!isNaN(num)) {
                       total += num; 
               }
           }
       }
       var totalFC = document.getElementById("totalFC");
	   totalFC.value = total; // total of FC
    }
}

Why the condition if(document.claim_dtl.fc.checked == true) is not worked?This is the logic that I use to control the assignment of subtotal and total to the correct field.Thank for your pleasure help...

[devil_vin]

Hi...anybody can help me?I feel lost about it...