Lots of thanks, Donncha, for this neat function. Works great!

Inge

> Hi Inge, here's a function you could use:
> 
> function formatInt ( ctrl )
> {
> 	var separator = " ";
> 	var int = ctrl.value.replace ( new RegExp ( separator, "g" ), "" );
> 	var regexp = new RegExp ( "\\B(\\d{3})(" + separator + "|$)" );
> 	do
> 	{
> 		int = int.replace ( regexp, separator + "$1" );
> 	}
> 	while ( int.search ( regexp ) >= 0 )
> 	ctrl.value = int;
> }
> 
> I've used a space to separate each thousand, but you can use whatever 
you 
> like by changing the value in "separator".
> The function takes the value in the form field specified in the ctrl 
> parameter ( you can use something like this: <input type="text" 
> onkeyup="formatInt ( this )"> to reference the text box, note that you 
> must use onKeyUp as the event, otherwise the last entered digit will not 
> register ), it then removes any previously formatted separators, and 
> declares a new regular expression. The regexp looks for 3 digits after a 
> non-word boundary (e.g. another digit), followed by either the end of 
the 
> string or one of our separators. I've used a do...while loop as it was 
the 
> easiest way I could think of to ensure the spaces were inserted in 
exactly 
> the right places.
> 
> > Hi,
> > 
> > My web application deals with great (integer) numbers. I therefore 
need 
> a 
> > JavaScript function that put in a thousand separator when the 
> > user "onchange" leaves one of my text boxes, in this case a blank as in
> > 1 234 567. A better alternative would perhaps be formating digit by 
> > digit "onKeyPress". Anybody who has a tip on how to format a number 
like 
> > this (preferably "onKeyPress")?
> > 
> > Regards,
> > Inge Larsson