Fantastic Count. Thanks! I was struggling to place the python string.replace function directly in the dtml-var tag, and having the usual dtml syntax problems. Here's what ended up working, for both input and output, allowing the use of commas for data entry, or not: <form name="myForm: method="post" action="updateForm"> <input type="text" name="total_area:float" value="<dtml-var total_area thousands_commas null=0.00> ...Submit </form> and in dtml method updateForm <dtml-call "REQUEST.set('total_area', _.string.replace(total_area,',',''))"> <dtml-call "REQUEST.set('total_area', _.float(total_area))"> <!-- Call the update SQL method. <dtml-call name="SQL_updateTable"> <!- Reload the updated form. --> <dtml-call expr="RESPONSE.redirect('.')"> The first two line are really the relevant ones. Harlow Pinson Indepth Learning Email: hpinson@indepthl.com Web: http://www.indepthl.com Voice: 505-994-2135 FAX: 208-475-7678