Index: ps/trunk/source/scriptinterface/ScriptConversions.h
===================================================================
--- ps/trunk/source/scriptinterface/ScriptConversions.h
+++ ps/trunk/source/scriptinterface/ScriptConversions.h
@@ -86,4 +86,26 @@
 	return FromJSVal_vector(cx, v, out); \
 }
 
+template<typename T> static bool FromJSProperty(JSContext* cx, JS::HandleValue v, const char* name, T& out)
+{
+	if (!v.isObject())
+		return false;
+
+	JSAutoRequest rq(cx);
+	JS::RootedObject obj(cx, &v.toObject());
+
+	bool hasProperty;
+	if (!JS_HasProperty(cx, obj, name, &hasProperty))
+		return false;
+
+	JS::RootedValue value(cx);
+	if (!hasProperty || !JS_GetProperty(cx, obj, name, &value))
+		return false;
+
+	if (!ScriptInterface::FromJSVal(cx, value, out))
+		return false;
+
+	return true;
+}
+
 #endif //INCLUDED_SCRIPTCONVERSIONS