diff --git a/src/ecmascript/spidermonkey/document.cpp b/src/ecmascript/spidermonkey/document.cpp
index 59114c93..0b9108ba 100644
--- a/src/ecmascript/spidermonkey/document.cpp
+++ b/src/ecmascript/spidermonkey/document.cpp
@@ -1327,7 +1327,7 @@ document_write_do(JSContext *ctx, unsigned int argc, JS::Value *rval, int newlin
 				add_string_to_string(&interpreter->current_writecode->string, &string);
 				done_string(&string);
 			} else {
-				struct string *ret = add_to_ecmascript_string_list(&interpreter->writecode, string.source, string.length, element_offset);
+				(void)add_to_ecmascript_string_list(&interpreter->writecode, string.source, string.length, element_offset);
 				done_string(&string);
 				interpreter->current_writecode = interpreter->current_writecode->next;
 			}
diff --git a/src/ecmascript/spidermonkey/element.cpp b/src/ecmascript/spidermonkey/element.cpp
index a95b975d..bce3e011 100644
--- a/src/ecmascript/spidermonkey/element.cpp
+++ b/src/ecmascript/spidermonkey/element.cpp
@@ -2425,8 +2425,6 @@ element_addEventListener(JSContext *ctx, unsigned int argc, JS::Value *rval)
 	JS::CallArgs args = CallArgsFromVp(argc, rval);
 	JS::RootedObject hobj(ctx, &args.thisv().toObject());
 
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
-
 	if (!JS_InstanceOf(ctx, hobj, &element_class, NULL)) {
 #ifdef ECMASCRIPT_DEBUG
 	fprintf(stderr, "%s:%s %d\n", __FILE__, __FUNCTION__, __LINE__);
@@ -2490,8 +2488,6 @@ element_removeEventListener(JSContext *ctx, unsigned int argc, JS::Value *rval)
 	JS::CallArgs args = CallArgsFromVp(argc, rval);
 	JS::RootedObject hobj(ctx, &args.thisv().toObject());
 
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
-
 	if (!JS_InstanceOf(ctx, hobj, &element_class, NULL)) {
 #ifdef ECMASCRIPT_DEBUG
 	fprintf(stderr, "%s:%s %d\n", __FILE__, __FUNCTION__, __LINE__);
diff --git a/src/ecmascript/spidermonkey/keyboard.cpp b/src/ecmascript/spidermonkey/keyboard.cpp
index f658a580..9182078c 100644
--- a/src/ecmascript/spidermonkey/keyboard.cpp
+++ b/src/ecmascript/spidermonkey/keyboard.cpp
@@ -116,8 +116,6 @@ keyboardEvent_constructor(JSContext* ctx, unsigned argc, JS::Value* vp)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
-
 	if (!newObj) {
 		return false;
 	}
@@ -155,7 +153,6 @@ keyboardEvent_get_property_key(JSContext *ctx, unsigned int argc, JS::Value *vp)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct keyboard *keyb = JS::GetMaybePtrFromReservedSlot<struct keyboard>(hobj, 0);
 
 	if (!keyb) {
@@ -185,7 +182,6 @@ keyboardEvent_get_property_keyCode(JSContext *ctx, unsigned int argc, JS::Value
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct keyboard *keyb = JS::GetMaybePtrFromReservedSlot<struct keyboard>(hobj, 0);
 
 	if (!keyb) {
diff --git a/src/ecmascript/spidermonkey/message.cpp b/src/ecmascript/spidermonkey/message.cpp
index 45c9fc67..5830f723 100644
--- a/src/ecmascript/spidermonkey/message.cpp
+++ b/src/ecmascript/spidermonkey/message.cpp
@@ -123,8 +123,6 @@ messageEvent_constructor(JSContext* ctx, unsigned argc, JS::Value* vp)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
-
 	if (!newObj) {
 		return false;
 	}
@@ -163,7 +161,6 @@ messageEvent_get_property_data(JSContext *ctx, unsigned int argc, JS::Value *vp)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct message_event *event = JS::GetMaybePtrFromReservedSlot<struct message_event>(hobj, 0);
 
 	if (!event) {
@@ -195,7 +192,6 @@ messageEvent_get_property_lastEventId(JSContext *ctx, unsigned int argc, JS::Val
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct message_event *event = JS::GetMaybePtrFromReservedSlot<struct message_event>(hobj, 0);
 
 	if (!event) {
@@ -227,7 +223,6 @@ messageEvent_get_property_origin(JSContext *ctx, unsigned int argc, JS::Value *v
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct message_event *event = JS::GetMaybePtrFromReservedSlot<struct message_event>(hobj, 0);
 
 	if (!event) {
@@ -259,7 +254,6 @@ messageEvent_get_property_source(JSContext *ctx, unsigned int argc, JS::Value *v
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct message_event *event = JS::GetMaybePtrFromReservedSlot<struct message_event>(hobj, 0);
 
 	if (!event) {
@@ -301,7 +295,7 @@ get_messageEvent(JSContext *ctx, char *data, char *origin, char *source)
 
 	char id[32];
 
-	snprintf(id, "%d", 31, ++lastEventId);
+	snprintf(id, 31, "%d", ++lastEventId);
 	event->lastEventId = stracpy(id);
 	JS::SetReservedSlot(e, 0, JS::PrivateValue(event));
 
diff --git a/src/ecmascript/spidermonkey/window.cpp b/src/ecmascript/spidermonkey/window.cpp
index b11bda4c..c4a096b1 100644
--- a/src/ecmascript/spidermonkey/window.cpp
+++ b/src/ecmascript/spidermonkey/window.cpp
@@ -305,7 +305,6 @@ window_removeEventListener(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct el_window *elwin = JS::GetMaybePtrFromReservedSlot<struct el_window>(hobj, 0);
 
 	if (argc < 2) {
@@ -355,7 +354,6 @@ window_postMessage(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct el_window *elwin = JS::GetMaybePtrFromReservedSlot<struct el_window>(hobj, 0);
 
 	if (argc < 2) {
@@ -631,8 +629,6 @@ window_clearTimeout(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
-
 	JS::CallArgs args = JS::CallArgsFromVp(argc, rval);
 
 	if (argc != 1) {
diff --git a/src/ecmascript/spidermonkey/xhr.cpp b/src/ecmascript/spidermonkey/xhr.cpp
index 02940d71..643c4400 100644
--- a/src/ecmascript/spidermonkey/xhr.cpp
+++ b/src/ecmascript/spidermonkey/xhr.cpp
@@ -373,7 +373,6 @@ xhr_abort(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct xhr *xhr = JS::GetMaybePtrFromReservedSlot<struct xhr>(hobj, 0);
 
 	if (xhr && xhr->download.conn) {
@@ -400,7 +399,6 @@ xhr_addEventListener(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct xhr *xhr = JS::GetMaybePtrFromReservedSlot<struct xhr>(hobj, 0);
 
 	if (argc < 2) {
@@ -449,7 +447,6 @@ xhr_removeEventListener(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct xhr *xhr = JS::GetMaybePtrFromReservedSlot<struct xhr>(hobj, 0);
 
 	if (argc < 2) {
@@ -499,9 +496,7 @@ xhr_getAllResponseHeaders(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct xhr *xhr = JS::GetMaybePtrFromReservedSlot<struct xhr>(hobj, 0);
-	struct view_state *vs = interpreter->vs;
 
 	if (!xhr) {
 		return false;
@@ -531,9 +526,7 @@ xhr_getResponseHeader(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct xhr *xhr = JS::GetMaybePtrFromReservedSlot<struct xhr>(hobj, 0);
-	struct view_state *vs = interpreter->vs;
 
 	if (!xhr || argc == 0) {
 		return false;
@@ -1122,12 +1115,7 @@ xhr_setRequestHeader(JSContext *ctx, unsigned int argc, JS::Value *rval)
 #endif
 		return false;
 	}
-	struct ecmascript_interpreter *interpreter = (struct ecmascript_interpreter *)JS::GetRealmPrivate(comp);
 	struct xhr *xhr = JS::GetMaybePtrFromReservedSlot<struct xhr>(hobj, 0);
-	struct view_state *vs;
-	struct document_view *doc_view;
-	vs = interpreter->vs;
-	doc_view = vs->doc_view;
 
 	if (!xhr) {
 		return false;