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@@ -1,3 +1,5 @@
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+* Fixed Effect.ScrollTo. Changeset 8686 had a typo, document.viewport.getScrollOffsets[0] is always undefined. Removed the max check as it is not a cross-browser way to get scroll height and breaks the effect. Depending on scrollTo to do the right thing.  Closes #11306.  [Nick Stakenburg]
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+
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 * Update version check so all Prototype versions can be required, not just x.x.x.  Closes #10966.  [Nick Stakenburg]
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 * Using $$ in the loader instead of getElementsByTagName to prevent limitations.  Closes #9032.  [Nick Stakenburg]

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@@ -507,15 +507,14 @@ Effect.Highlight = Class.create(Effect.Base, {
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 Effect.ScrollTo = function(element) {
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   var options = arguments[1] || { },
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-    scrollOffsets = document.viewport.getScrollOffsets(),
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-    elementOffsets = $(element).cumulativeOffset(),
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-    max = document.viewport.getScrollOffsets[0] - document.viewport.getHeight(); 
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+  scrollOffsets = document.viewport.getScrollOffsets(),
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+  elementOffsets = $(element).cumulativeOffset();
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   if (options.offset) elementOffsets[1] += options.offset;
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   return new Effect.Tween(null,
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     scrollOffsets.top,
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-    elementOffsets[1] > max ? max : elementOffsets[1],
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+    elementOffsets[1],
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     options,
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     function(p){ scrollTo(scrollOffsets.left, p.round()) }
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   );