yet another silly question: how do I determine if a number is actually a float? (I want 2.00 to return true also).

To see if a number isn't whole, you could use:

myNum = 2.4534;
if(Math.round(myNum)!=myNum){
trace("The number is a float!");
}

You say you want it to work for 2.00 but how are you going to hae 2.00? (2.00
as a number is still going to be plain old 2) Is your number actually going to
be a string? If so, just look for a '.' in the string:

myNum = "2.00";
if(myNum.indexOf('.')!=-1){
trace("The 'number' is a float!");
}

or

myNum = "2.00";
if(myNum.split('.').length>1){
trace("The 'number' is a float!");
}

Great , Thank you very much.

Is this a standard procedure or your own logic !?
(just to know, nothing intentonal :-) ).

Hi,

I think this should do it:

var myNum = 2.987654321;
var places = 3;
var roundedNum = Math.round(myNum*Math.pow(10,places))/Math.pow(10,places);