diff -rupN webform/components/select.inc webformnew/components/select.inc
--- webform/components/select.inc	2010-04-11 00:02:09.000000000 +0200
+++ webformnew/components/select.inc	2010-06-18 11:26:36.000000000 +0200
@@ -261,6 +261,7 @@ function _webform_render_select($compone
     '#required'      => $component['mandatory'],
     '#weight'        => $component['weight'],
     '#description'   => $filter ? _webform_filter_descriptions($component['extra']['description']) : $component['extra']['description'],
+    '#webform_component' => $component,
   );
 
   // Convert the user-entered options list into an array.
diff -rupN webform/webform.module webformnew/webform.module
--- webform/webform.module	2010-04-11 08:13:51.000000000 +0200
+++ webformnew/webform.module	2010-06-18 10:01:39.000000000 +0200
@@ -1013,7 +1013,6 @@ function webform_node_load($node) {
     $component['mandatory'] = $c['mandatory'];
     $component['pid'] = $c['pid'];
     $component['weight'] = $c['weight'];
-
     webform_component_defaults($component);
   }
 
@@ -1604,6 +1603,27 @@ function webform_client_form_validate($f
 }
 
 /**
+ * Recursive method to find the parent in a multidimensional array.
+ */
+function find_parent($index, $array, $needle, $parent = null) {
+    foreach ($array as $key => $value) {
+        if (is_array($value)) {
+            $pass = $parent;
+            if (is_string($key)) {
+                $pass = $key;
+            }
+            $found = find_parent($index, $value, $needle, $pass);
+            if ($found !== false) {
+                return $found;
+            }
+        } else if ($key == $index && $value === $needle) {
+            return $parent;
+        }
+    }
+    return false;
+}
+
+/**
  * Recursive validation function to trigger normal Drupal validation.
  *
  * This function imitates _form_validate in Drupal's form.inc, only it sets
@@ -1618,6 +1638,20 @@ function _webform_client_form_validate($
   // Recurse through all children.
   foreach (element_children($elements) as $key) {
     if (isset($elements[$key]) && $elements[$key]) {
+		if(!empty($elements[$key]['#webform_component']['extra']['webform_conditional_field_key'])){
+			$veldnaam = $elements[$key]['#webform_component']['extra']['webform_conditional_field_key']; // Van welk veld het veld afhankelijk is.
+			$veldwaarde = $elements[$key]['#webform_component']['extra']['webform_conditional_field_value']; // Wat verwacht wordt als hij dependent is
+			$index = find_parent($veldnaam, $elements['#post']['submitted'], $veldwaarde); // Krijg het juiste fieldset als het veld zich binnen een fieldset bevindt
+			if(!empty($index)){
+				$veldwaarde_submitted = $elements['#post']['submitted'][$index][$veldnaam]; // Wat gebruiker gekozen heeft
+			}
+			else{
+				$veldwaarde_submitted = $elements['#post']['submitted'][$veldnaam]; // Wat gebruiker gekozen heeft
+			}
+			if($veldwaarde != $veldwaarde_submitted){ // Als het verwachte antwoord NIET overeenkomt wat gekozen is, is het veld NIET verplicht.
+				$elements[$key]['#required'] = 0;
+			}	
+		}
       _webform_client_form_validate($elements[$key], $form_state, FALSE);
     }
   }