方法1：
<meta http-equiv="refresh" content="5;url=hello.html">
方法2：
<script type="text/javascript">
window.location.href="hello.html";(直接跳转)；
</script>
方法2’
<script type="text/javascript">
setTimeout("javascript:location.href='hello.html'",2000);(定时跳转)
</script>
方法2”
<script type="text/javascript">
setTimeout(function(){
location.gref="hellow.html";）(定时跳转)
},2000)
</script>