External links

docs.it4i/src/css.css

+a:not([href*="//"]) {
+    /* CSS for internal links */
+}
+
+a[href*="//"] {
+    /*CSS for external links */
+    background: transparent url("/img/external.png") no-repeat right 0px top 1px;
+    background-size: 12px;
+    padding: 1px 16px 1px 0px;
+}