prova così:
ciaocodice:<input type="text" name="fa" onkeyup="if (this.value.length==2) { this.form.fb.focus(); this.form.fb.select(); }" />
prova così:
ciaocodice:<input type="text" name="fa" onkeyup="if (this.value.length==2) { this.form.fb.focus(); this.form.fb.select(); }" />