diff --git a/lib/javascript-static.js b/lib/javascript-static.js
index c9d2efd19e6..91b75f04e15 100644
--- a/lib/javascript-static.js
+++ b/lib/javascript-static.js
@@ -1109,9 +1109,12 @@ function openpopup(event, args) {
         }
     }
 
-    // Cleans window name because IE does not support funky ones.
+    // Make sure the name argument is set and valid.
     var nameregex = /[^a-z0-9_]/i;
-    if (args.name.match(nameregex)) {
+    if (typeof args.name !== 'string') {
+        args.name = '_blank';
+    } else if (args.name.match(nameregex)) {
+        // Cleans window name because IE does not support funky ones.
         args.name = args.name.replace(nameregex, '_');
         if (M.cfg.developerdebug) {
             alert('DEVELOPER NOTICE: Invalid \'name\' passed to openpopup()');