rem: for (var i = 0; i < children.length; i++) 
add: for (var i = children.length - 1; i >= 0; --i) 
context: function deleteHistoryItems(aParent){  var children = aParent.childNodes;  for (var i = 0; i < children.length; i++)    {      var index = children[i].getAttribute("index");      if (index)        aParent.removeChild(children[i]);    }}
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