Fixes #422 by getting scrollTop from document.documentElement first instead of the document.body: because document.body.scrollTop is always 0 in IE11 on Windows Phone when running in HTML5 Doctype.
Fixes #422 by getting scrollTop from document.documentElement first instead of the document.body: because document.body.scrollTop is always 0 in IE11 on Windows Phone when running in HTML5 Doctype.

manakor/closure-library,manakor/closure-library,manakor/closure-library,manakor/closure-library