diff --git a/src/browser/DomElement.js b/src/browser/DomElement.js
index aa7ee55d..6a70a227 100644
--- a/src/browser/DomElement.js
+++ b/src/browser/DomElement.js
@@ -41,15 +41,26 @@ var DomElement = new function() {
 	}
 
 	return {
-		getWindow: function(doc) {
+		getViewport: function(doc) {
 			return doc.defaultView || doc.parentWindow;
 		},
 
+		getViewportSize: function(el) {
+			var doc = el.ownerDocument,
+				view = DomElement.getViewport(doc),
+				body = doc.getElementsByTagName(
+					doc.compatMode === 'CSS1Compat' ? 'html' : 'body')[0];
+			return Size.create(
+				view.innerWidth || body.clientWidth,
+				view.innerHeight || body.clientHeight
+			);
+		},
+
 		getComputedStyle: function(el, name) {
 			if (el.currentStyle)
 				return el.currentStyle[Base.camelize(name)];
-			var style = DomElement.getWindow(el.ownerDocument).getComputedStyle(
-					el, null);
+			var style = DomElement.getViewport(el.ownerDocument)
+					.getComputedStyle(el, null);
 			return style ? style.getPropertyValue(Base.hyphenate(name)) : null;
 		},
 
@@ -77,15 +88,6 @@ var DomElement = new function() {
 					DomElement.getSize(el));
 		},
 
-		getWindowSize: function() {
-			var doc = document.getElementsByTagName(
-					document.compatMode === 'CSS1Compat' ? 'html' : 'body')[0];
-			return Size.create(
-				window.innerWidth || doc.clientWidth,
-				window.innerHeight || doc.clientHeight
-			);
-		},
-
 		/**
 		 * Checks if element is invisibile (display: none, ...)
 		 */
@@ -100,7 +102,7 @@ var DomElement = new function() {
 			// See if the viewport bounds intersect with the windows rectangle
 			// which always starts at 0, 0
 			return !DomElement.isInvisible(el)
-					&& new Rectangle([0, 0], DomElement.getWindowSize())
+					&& new Rectangle([0, 0], DomElement.getViewportSize(el))
 						.intersects(DomElement.getBounds(el, false, true));
 		}
 	};
diff --git a/src/ui/View.js b/src/ui/View.js
index 8ab6428f..61cc4e70 100644
--- a/src/ui/View.js
+++ b/src/ui/View.js
@@ -40,7 +40,7 @@ var View = this.View = Base.extend(/** @lends View# */{
 				// stretch it in
 				var offset = DomElement.getOffset(canvas, false, true),
 					that = this;
-				size = DomElement.getWindowSize().subtract(offset);
+				size = DomElement.getViewportSize(canvas).subtract(offset);
 				canvas.width = size.width;
 				canvas.height = size.height;
 				DomEvent.add(window, {
@@ -50,8 +50,8 @@ var View = this.View = Base.extend(/** @lends View# */{
 						if (!DomElement.isInvisible(canvas))
 							offset = DomElement.getOffset(canvas, false, true);
 						// Set the size now, which internally calls onResize
-						that.setViewSize(
-								DomElement.getWindowSize().subtract(offset));
+						that.setViewSize(DomElement.getViewportSize(canvas)
+								.subtract(offset));
 						// If there's a _onFrameCallback, call it staight away,
 						// but without requesting another animation frame.
 						if (that._onFrameCallback) {