If you set TextAlign to Left, then you can access the value by setting
var UnCheckedfilename = cbh.previousSibling.innerHTML;
because "the previousSibling property returns the element that immediately precedes the current element in the childNodes collection of the current element's parent."
where as "the nextSibling property returns the element that immediately follows the current element in the childNodes collection of the current element's parent."
For more info, check this
http://help.dottoro.com/ljanlxgl.php[
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