1 files changed, 18 insertions, 3 deletions
diff --git a/src/components/script/dom/htmlmediaelement.rs b/src/components/script/dom/htmlmediaelement.rs
index 371374c4859..d28b38085de 100644
--- a/src/components/script/dom/htmlmediaelement.rs
+++ b/src/components/script/dom/htmlmediaelement.rs
@@ -2,18 +2,33 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use dom::bindings::js::JS;
+use dom::bindings::codegen::InheritTypes::HTMLMediaElementDerived;
 use dom::bindings::utils::ErrorResult;
-use dom::document::AbstractDocument;
-use dom::element::ElementTypeId;
+use dom::document::Document;
+use dom::element::{ElementTypeId, HTMLAudioElementTypeId, HTMLVideoElementTypeId};
+use dom::eventtarget::{EventTarget, NodeTargetTypeId};
 use dom::htmlelement::HTMLElement;
+use dom::node::ElementNodeTypeId;
 use servo_util::str::DOMString;
 
+#[deriving(Encodable)]
 pub struct HTMLMediaElement {
     htmlelement: HTMLElement,
 }
 
+impl HTMLMediaElementDerived for EventTarget {
+    fn is_htmlmediaelement(&self) -> bool {
+        match self.type_id {
+            NodeTargetTypeId(ElementNodeTypeId(HTMLVideoElementTypeId)) |
+            NodeTargetTypeId(ElementNodeTypeId(HTMLAudioElementTypeId)) => true,
+            _ => false
+        }
+    }
+}
+
 impl HTMLMediaElement {
-    pub fn new_inherited(type_id: ElementTypeId, tag_name: DOMString, document: AbstractDocument) -> HTMLMediaElement {
+    pub fn new_inherited(type_id: ElementTypeId, tag_name: DOMString, document: JS<Document>) -> HTMLMediaElement {
         HTMLMediaElement {
             htmlelement: HTMLElement::new_inherited(type_id, tag_name, document)
         }