Added support for differently named submit functions based on the name of

the submit button pressed.

htdocs/lib/pieforms/pieform.php

@@ -556,7 +556,17 @@ class Pieform {
 
             // Submit the form if things went OK
             if ($this->submit && !$this->has_errors()) {
-                if (function_exists($this->submitfunction)) {
+                foreach ($this->get_elements() as $element) {
+                    // @todo Rename 'ajaxmessages' to 'submitelement'
+                    if ($element['ajaxmessages'] == true && isset($values[$element['name']])) {
+                        $function = "{$this->name}_submit_{$element['name']}";
+                        if (function_exists($function)) {
+                            $function($values);
+                            break;
+                        }
+                    }
+                }
+                else if (function_exists($this->submitfunction)) {
                     $function = $this->submitfunction;
                     // Call the user defined function for processing a submit
                     // This function should really redirect/exit after it has

htdocs/lib/pieforms/pieform/elements/submitcancel.php

@@ -42,6 +42,8 @@ function pieform_render_submitcancel($element, Pieform $form) {
 }
 
 function pieform_render_submitcancel_set_attributes($element) {
+    // @todo change to 'submitelement' => true, more generic and can be used
+    // for working out which submit button was pressed
     $element['ajaxmessages'] = true;
     return $element;
 }