Thank you for your answers, neither solution makes a difference.
Code:
<span onMouseOver="window.status='Explanation about `Exit.`'; parent.panl.location='u1/not/note_exit.htm'; return true" onMouseOut="window.status='Splash page.'; parent.panl.location='splash_left.htm'; return true" onClick='top.panl.location="u1/not/note_exit.htm"'>Exit </span>
Code:
<A HREF="#" onMouseOver="window.status='Explanation about `Exit.`'; parent.panl.location='u1/not/note_exit.htm'; return true" onMouseOut="window.status='Splash page.'; parent.panl.location='splash_left.htm'; return false" onClick='top.panl.location="u1/not/note_exit.htm"'>Exit </A>