请问怎么把下面的类似N个JS，写成一个循环呢？
<script  language=JavaScript>
  
function baisun1(o,b) {
 var newV = "";

 var oldV = new String(parseFloat(o.value.replace(/\,/g, ""))+<?echo $row[2]; ?> );
  var j = 0;
  
  for (i=oldV.length-1; i>0; i--) {
  newV = oldV.charAt(i) + newV;
                              j++;
                          
                              if (j==3) {j=0; newV = "," + newV;}
                        }
                       if (oldV.length>0) {newV = oldV.charAt(0) + newV;}
                        b.value = newV;                                            

}

</script>
  <script  language=JavaScript>
  
function baisun2(o,b) {
 var newV = "";
 var oldV = new String(parseFloat(o.value.replace(/\,/g, ""))+<?echo $row[3];?> );
  var j = 0;
  
  for (i=oldV.length-1; i>0; i--) {
  newV = oldV.charAt(i) + newV;
                              j++;
                          
                              if (j==3) {j=0; newV = "," + newV;}
                        }
                       if (oldV.length>0) {newV = oldV.charAt(0) + newV;}
                        b.value = newV;                                            

}

</script>
  <script  language=JavaScript>
  
function baisun3(o,b) {
 var newV = "";
 var oldV = new String(parseFloat(o.value.replace(/\,/g, ""))+<?echo $row[4];?> );
  var j = 0;
  
  for (i=oldV.length-1; i>0; i--) {
  newV = oldV.charAt(i) + newV;
                              j++;
                          
                              if (j==3) {j=0; newV = "," + newV;}
                        }
                       if (oldV.length>0) {newV = oldV.charAt(0) + newV;}
                        b.value = newV;                                            

}

</script>