<!DOCTYPE html>
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>&lt;div&gt; with role combobox; inherited supported state or property "aria-activedescendant"
         value of "obj1"
      </title>
   </head>
   <body>
      <div id="test" role="combobox" aria-haspopup="true" aria-expanded="true" aria-activedescendant="obj1" tabindex="0">
          <div role="textbox"></div>
          <div role="listbox">
            <div id="obj1" role="option">obj1</div>
            <div id="obj2" role="option">obj2</div>
          </div>
      </div>
   </body>
</html>