- <style>
- body{overflow:hidden;margin:0px}
- div{position:absolute}
- </style>
- <div style="background-color:#3399CC;z-index:100">请问如何使层始终居于顶部</div>
- <div style="width:100%;height:100%;overflow:auto"><script>document.write(new Array(100).join('a<br>'))</script></div>