diff --git a/themes/bootstrap-blog/scripts/fancybox.js b/themes/bootstrap-blog/scripts/fancybox.js
new file mode 100644
index 0000000..50c154f
--- /dev/null
+++ b/themes/bootstrap-blog/scripts/fancybox.js
@@ -0,0 +1,24 @@
+var rUrl = /((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[.\!\/\\w]*))?)/;
+
+/**
+ * Fancybox tag
+ *
+ * Syntax:
+ *   {% fancybox /path/to/image [/path/to/thumbnail] [title] %}
+ */
+
+hexo.extend.tag.register('fancybox', function(args){
+  var original = args.shift(),
+    thumbnail = '';
+
+  if (args.length && rUrl.test(args[0])){
+    thumbnail = args.shift();
+  }
+
+  var title = args.join(' ');
+
+  return '<a class="fancybox" href="' + original + '" title="' + title + '">' +
+    '<img src="' + (thumbnail || original) + '" alt="' + title + '">'
+    '</a>' +
+    (title ? '<span class="caption">' + title + '</span>' : '');
+});
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