thirdTableCell.mouseDown();
assertTrue(selenium.isTextPresent("onmousedown works"));
assertTrue(selenium.isTextPresent("mousedown"));
// onmouseup
thirdTableCell.mouseUp();
assertTrue(selenium.isTextPresent("onmouseup works"));
assertTrue(selenium.isTextPresent("mouseup"));
// onmouseover
dataTable("fn:fourth").body().row(0).cell(0).mouseOver();