ML</strong> <em>markup</em>.<br>" +
      "<button id=\"btn-nest\">Hover me</button>"));
    tooltip2.attach('btn5');

    var tooltip3 = new goog.ui.Tooltip('btn3', 'Tooltip for button 3');

    var msg4 = "Tooltip for button 4, demonstrating that it's positioned " +
               "correctly even when inside a scrolling container.";
    var tooltip4 = new goog.ui.Tooltip('btn4', msg4);

    var msg5 = "tooltip for the word 'tooltips'."
    var tooltip5 = new goog.ui.Tooltip('txt1', msg5);
    tooltip5.att