<html>
<head>
<script>
  function selectSpan() {
    var selection = window.getSelection();
    var range = document.createRange();
    range.setStartBefore(document.getElementById('selectSpan'));
    range.setEndAfter(document.getElementById('selectSpan'));
    selection.addRange(range);
    return "";
  }
</script>
</head>
<body>
  findMe some text
  <br>
  <span id="selectSpan">select this text</span>
  some text.. find .. find ..
  <br>
  more text findMe and text.
  <br><br><br>
  <div id="log"><div>
</body>
</html>