Index: branches/RC/core/kernel/db/db_tag_processor.php
===================================================================
diff -u -N -r11662 -r11685
--- branches/RC/core/kernel/db/db_tag_processor.php	(.../db_tag_processor.php)	(revision 11662)
+++ branches/RC/core/kernel/db/db_tag_processor.php	(.../db_tag_processor.php)	(revision 11685)
@@ -2425,6 +2425,52 @@
 	{
 
 	}
+
+	/**
+	 * Checks, that field is visible on edit form
+	 *
+	 * @param Array $params
+	 * @return bool
+	 */
+	function FieldVisible($params)
+	{
+		$check_field = $params['field'];
+		$fields = $this->Application->getUnitOption($this->Prefix, 'Fields');
+		$show_mode = array_key_exists('show_mode', $fields[$check_field]) ? $fields[$check_field]['show_mode'] : true;
+
+		if ($show_mode === smDEBUG) {
+			return defined('DEBUG_MODE') && DEBUG_MODE;
+		}
+
+		return $show_mode;
+	}
+
+	/**
+	 * Checks, that there area visible fields in given section on edit form
+	 *
+	 * @param Array $params
+	 * @return bool
+	 */
+	function FieldsVisible($params)
+	{
+		if (!$params['fields']) {
+			return true;
+		}
+
+		$fields = $this->Application->getUnitOption($this->Prefix, 'Fields');
+		$check_fields = explode(',', $params['fields']);
+
+		foreach ($check_fields as $check_field) {
+			// when at least one field in subsection is visible, then subsection is visible too
+			$show_mode = array_key_exists('show_mode', $fields[$check_field]) ? $fields[$check_field]['show_mode'] : true;
+			if (($show_mode === true) || (($show_mode === smDEBUG) && (defined('DEBUG_MODE') && DEBUG_MODE))) {
+				// field is visible
+				return true;
+			}
+		}
+
+		return false;
+	}
 }
 
 ?>
\ No newline at end of file