diff --git a/doc/style.css b/doc/style.css
index 7846398d7..3d6179179 100644
--- a/doc/style.css
+++ b/doc/style.css
@@ -19,6 +19,7 @@
 	border-bottom: 1px solid #000;
 }
 
+/* Used for adding a blog page. */
 #blogform {
 	margin: 10 10;
 	border: 1px solid #000;
@@ -36,3 +37,12 @@
 #pageinfo {
 	font-style: italic;
 }
+
+/* Used for invalid form fields. */
+#fb_invalid {
+	background: red;
+}
+/* Used for required form fields. */
+#fb_required {
+	fornt-style: bold;
+}