js 浮动广告栏

关键函数：

window.open() 弹出新页面

moveTo(x,y)页面移动到指定位置

window.setInterval("functionName()",redoTime)定时执行函数体

<script>
var x=0,y=0,w=400,h=200;
var dx=5,dy=5;
var interval=100;
var win =window.open("","","width="+w+",height="+h,false);
win.moveTo(x,y);
var intervalID=window.setInterval("move()",interval);
function move()
{
if((x+dx>screen.availWidth-w)||(x+dx<0))
dx=-dx;
if((y+dy>screen.availheight-h)||(y+dy<0))
dy=-dy;
x+=dx;
y+=dy;
win.moveTo(x,y);
}
</script>
<form>
<input type="button" onclick="clearInterval(intervalID);" value="stop"></input>

</form>