marquee的施用

<marquee scrollamount="2" scrolldelay="2" onmouseover="this.stop()" onmouseout="this.start()" 
width="100%" height="21">Hello!!</marquee>
1.scrollamount="2" scrolldelay="2"代表滚动的速度
2.onmouseover  onmouseout 代表鼠标移上去(停止)和移开(滚动)