<script language=javascript>
function commafy(form){
var re=/(-?\d+)(\d{3})/
var num=form.entry.value
while(re.test(num)){
num=num.replace(re,"$1,$2")
}
form.entry.value=num
}
</script>
function commafy(form){
var re=/(-?\d+)(\d{3})/
var num=form.entry.value
while(re.test(num)){
num=num.replace(re,"$1,$2")
}
form.entry.value=num
}
</script>
<script language=javascript>
function commafy(num){
num = num+"";
var re=/(-?\d+)(\d{3})/
while(re.test(num)){
num=num.replace(re,"$1,$2")
}
return num;
}
</script>
<input type=button value="commafy" onclick="alert(commafy(123456789.01))">
</BODY>