I found what was a problem: This is not bug in AutoIt. This is bug in script. First read here: https://msdn.microsoft.com/pl-pl/library/cc304115(v=vs.85).aspx https://msdn.microsoft.com/pl-pl/library/aa752483(v=vs.85).aspx   then look in MSDN example:   function getFruit() { var fruits = document.getElementById('fruitsalad').querySelectorAll('li.fruit'); var fruitList = ""; for (var i = 0; i < fruits.length; i++) { fruitList