Adding commas to form results

[lukipela]

Greetings,

I would like this form to display the results with commas. Unfortunately, I had now javascript experience till yesterday, and even though I've found lots of info on how to add commas in, I just cant seem to get it done. Any help would be greatly appreciated.

Thanks,
Lukipela

Here is my script

<script>
function temp(form)
{
  var a = parseFloat(form.price.value, 10);
  var b = 0;
  if(a > 249999){
  b = 250000};
  if(a < 250000){
  b = a};
  var c = 0;
  c = (a - b) * .5;
  var d = 0;
  d = (c *.2)
  var e = 0;
  e = (b + c + d)
  var f = 0;
  f = (e * .35)
  var g = 0;
  g = (a - f)
  form.price.value = a.toFixed(2);
  form.sec179.value = b.toFixed(2);
  form.bonus.value = c.toFixed(2);
  form.fyd.value = d.toFixed(2);
  form.td.value = e.toFixed(2);
  form.savings.value = f.toFixed(2);
  form.newprice.value = g.toFixed(2);
}
</script>

And here is the html

<form style="width: 188px">
	Enter cost of equipment<br />
	<input name="price" value="5000" maxlength="15" size="15" /><input name="calc" value="Calculate" type="BUTTON" onclick="temp(this.form)" /><br />
	<br />
	<input name="sec179" readonly="" size="15" /><br />
	<input name="bonus" readonly="" size="15" /><br />
	<input name="fyd" readonly="" size="15" /><br />
	<input name="td" readonly="" size="15" /><br />
	<input name="savings" readonly="" size="15" /><br />
	<input name="newprice" readonly="" size="15" /></form>

Here is a link to it ( hope this is ok to post)

http://www.tdmachinetools.com/tax%20savings.htm