--- simple_dialog/js/simple_dialog.js
+++ simple_dialog/js/simple_dialog.js
@@ -60,7 +60,7 @@
             event.preventDefault();
             // Set up some variables
             var url = $(this).attr('href');
-            var title = $(this).attr('title');
+            var title = $(this).attr('title') ? $(this).attr('title') : ' ';
             // Use defaults if not provided
             var selector = $(this).attr('name') ? $(this).attr('name') : settings.simpleDialog.selector;
             var options = $(this).attr('rel') ? Drupal.simpleDialog.explodeOptions($(this).attr('rel')) : Drupal.simpleDialog.explodeOptions(settings.simpleDialog.defaults);