Totals for values in an array

[agribben]

Apologies to everyone if i've missed something really obvious.

I have a list of values in an array which have come from a dynamc query. I want to total numbers from one column of the array and display this as the last row of a resulting table.

Can anyone point me at some code to calculate and store the totals?

[Jona]

<script type="text/javascript"><!--
 function addAll(arr){
   var newArr = 0;
  for(j=0; j<arr.length; j++){
     newArr += parseFloat(arr[j]);
  }
 return newArr;
}

 var arrA = ["12.20", "10.04", "15.19", "20.22"];
 var arrB = ["3.29", "13.39", "28.93", "1.28"];
    document.write('<table><th>Price1</th><th>Price2</th><th>Total</th>');
  for(var i=0; i<arrA.length; i++){
   if(arrA[i+1]){
    document.write('<tr><td>'+arrA[i]+'</td>');
    document.write('<td>'+arrB[i]+'</td><td>');
    document.write(parseFloat(arrA[i]+arrB[i]).toFixed(2));
    document.write('</td></tr>');
   } else {
    document.write('<tr><td>'+addAll(arrA)+'</td>');
    document.write('<td>'+addAll(arrB)+'</td><td>');
    document.write(parseFloat(addAll(arrA)+addAll(arrB)).toFixed(2));
    document.write('</td></tr>');
   }
 }
    document.write('</table>');
//--></script>