@@ -749,8 +749,13 @@ Element.addMethods({ viewportOffset: function(element) { element = $(element); - var rect = element.getBoundingClientRect(); - return new Element.Offset(rect.left, rect.top); + var rect = element.getBoundingClientRect(), + docEl = document.documentElement, + // The HTML element on IE < 8 has a 2px border by default, giving + // an incorrect offset, we correct this by subtracting clientTop/Left + top = rect.top - docEl.clientTop, + left = rect.left - docEl.clientLeft; + return new Element.Offset(left, top); }, cumulativeOffset: function(element) { src/dom/layout.js 093c0cce4bbb89b88b0af20356faa83906b3aafa Nick Stakenburg nick@nickstakenburg.com http://github.com/staaky/prototype/commit/3afb0002cbd31726187338c5119657b76111f80c 3afb0002cbd31726187338c5119657b76111f80c 2009-11-03T11:47:13-08:00 2009-11-03T11:47:13-08:00 Fix incorrect offset in Element.viewportOffset on IE < 8. 236d468ed273b51d58da306e52c9728af6c0f229 Nick Stakenburg nick@nickstakenburg.com