<input type=button value=后退 onclick=history.go(-1)> <input type=button value=刷新 onclick=history.go(-0)> <input type=button value=前进 onclick=history.go(+1)>
<script>function l() { window.open("yourURL","name","width=500,height=150,border=0") } setTimeout("l()",4000) </script>