I think Patrick is on to something. You could include a hidden input on your form (no form field, just html) with a delimited list of your form fields as the value.
With the function bound to the keypress event of the appropriate controls (see W3C note abave) all you would need to do is consult this hidden input for the tab order whenever Tab was pressed. Pretty easy drop in code. Your maintenance task is reduced to simply ordering the field IDs in the list.
I think Patrick is on to something. You could include a hidden input on your form (no form field, just html) with a delimited list of your form fields as the value.
With the function bound to the keypress event of the appropriate controls (see W3C note abave) all you would need to do is consult this hidden input for the tab order whenever Tab was pressed. Pretty easy drop in code. Your maintenance task is reduced to simply ordering the field IDs in the list.