The result is already quoted.

diff --git a/imp/lib/IMP.php b/imp/lib/IMP.php
index 1bfc2f6..4f4d84f 100644 (file)
--- a/imp/lib/IMP.php
+++ b/imp/lib/IMP.php
@@ -1231,7 +1231,7 @@ class IMP
             'cancel_text' => _("Cancel")
         );
 
-        return 'IMPDialog.display(\'' . Horde::escapeJson($js_params, array('urlencode' => true)) . '\')';
+        return 'IMPDialog.display(' . Horde::escapeJson($js_params, array('urlencode' => true)) . ')';
     }
 
     /**