Index: openacs-4/packages/acs-core-docs/www/xml/developers-guide/form-builder.xml
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-core-docs/www/xml/developers-guide/form-builder.xml,v
diff -u -N -r1.8 -r1.8.12.1
--- openacs-4/packages/acs-core-docs/www/xml/developers-guide/form-builder.xml	17 Jul 2006 05:38:37 -0000	1.8
+++ openacs-4/packages/acs-core-docs/www/xml/developers-guide/form-builder.xml	13 Oct 2013 10:33:55 -0000	1.8.12.1
@@ -76,7 +76,7 @@
     block that extends the form, you'll have the opportunity to add in
     subcategories:
     </para>
-    <programlisting>    if {[exists_and_not_null pm_task_id]} {
+    <programlisting>    if {[info exists pm_task_id] && $pm_task_id ne ""} {
     db_1row get_task_values { }
     ad_form -extend -name form_name -form { ... }
     </programlisting>
@@ -101,7 +101,7 @@
     <programlisting>
 ns_log notice it's my page!
 set mypage [ns_getform]
-if {[string equal "" $mypage]} {
+if {$mypage eq ""} {
     ns_log notice no form was submitted on my page
 } else {
     ns_log notice the following form was submitted on my page