diff --git a/webform_validation.validators.inc b/webform_validation.validators.inc
index f81b879..3606ce6 100644
--- a/webform_validation.validators.inc
+++ b/webform_validation.validators.inc
@@ -99,6 +99,26 @@ function webform_validation_webform_validation_validators() {
       'min_components' => 2,
       'description' => t('Verifies that all specified components contain equal values'),
     ),
+    'comparison' => array(
+      'name' => 'Compare two values',
+      'component_types' => array(
+        'date',
+        'email',
+        'hidden',
+        'number',
+        'textfield',
+        'select',
+        'time',
+      ),
+      'custom_error' => TRUE,
+      'custom_data' => array(
+        'label' => t('Comparison operator'),
+        'description' => t('Specify the comparison operator you want to use. Must be one of: >, >=, <, <=.'),
+      ),
+      'min_components' => 2,
+      'max_components' => 2,
+      'description' => t('Compare two values for greater than or less than, or equal to.'),
+    ),
     'unique' => array(
       'name' => "Unique values",
       'component_types' => array(
@@ -335,6 +355,70 @@ function webform_validation_webform_validation_validate($validator_name, $items,
         }
         return $errors;
         break;
+      case 'comparison':
+        foreach (array(1, 2) as $count) {
+          $entry[$count]['key'] = key($items);
+          $value = array_shift($items);
+          if ($components[$entry[$count]['key']]['type'] === 'date') {
+            if (checkdate((int) $value['month'], (int) $value['day'], (int) $value['year'])) {
+              $entry[$count]['value'] = date('Y-m-d', mktime(0, 0, 0, (int) $value['month'], (int) $value['day'], (int) $value['year']));
+            }
+            else {
+              $entry[$count]['value'] = NULL;
+            }
+          }
+          elseif ($components[$entry[$count]['key']]['type'] === 'time') {
+            $time = $value['hour'] . ':' . $value['minute'];
+            if (!empty($value['ampm'])) {
+              $time .= ' ' . $value['ampm'];
+            }
+            $time = strtotime($time);
+            if ($time) {
+              $entry[$count]['value'] = date('H:i', $time);
+            }
+            else {
+              $entry[$count]['value'] = NULL;
+            }
+          }
+          else {
+            $entry[$count]['value'] = _webform_validation_flatten_array($value);
+          }
+        }
+
+        // Don't validate if either are empty.
+        if (empty($entry[1]['value']) || empty($entry[2]['value'])) {
+          return;
+        }
+
+        $error = FALSE;
+        switch ($rule['data']) {
+          case '>':
+            if (!($entry[1]['value'] > $entry[2]['value'])) {
+              $error = TRUE;
+            }
+            break;
+          case '>=':
+            if (!($entry[1]['value'] >= $entry[2]['value'])) {
+              $error = TRUE;
+            }
+            break;
+          case '<':
+            if (!($entry[1]['value'] < $entry[2]['value'])) {
+              $error = TRUE;
+            }
+            break;
+          case '<=':
+            if (!($entry[1]['value'] <= $entry[2]['value'])) {
+              $error = TRUE;
+            }
+            break;
+        }
+
+        if ($error) {
+          $errors[$entry[2]['key']] = _webform_validation_i18n_error_message($rule);
+        }
+        return $errors;
+        break;
       case "unique":
         foreach ($items as $key => $val) {
           if (is_array($val)) {