Javascript window 对象 + 浮动广告

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window 浏览器窗口对象, 不用创建就能使用

1.属性
status
opener
closed
parent 父窗体
top 顶层窗体

2.方法
alert();
confirm();
prompt();
var dt = setInterval('aaa()', 100);
clearInterval(dt);
var to =setTimeout('aaa()'.100);
clearTimeout(to);
open();

3.成员对象
document
screen
history
frame
location
...

实例：浮动广告

<html><head><style>#one{width:100px;height:100px;position:absolute;background:#666;text-align:center;color:white;}</style></head><body><div id="one" style="left:0px;top:0px">我是广告</div><script>var one = document.getElementById('one');var vx = 5;var vy = 5;var x=0;var y=0function move(){x = x + vx;    y = y + vy;one.style.left = x;one.style.top = y;if(x + one.offsetWidth + 5> document.body.clientWidth || x<=0)vx=-1*vx;if(y + one.offsetHeight + 5> document.body.clientHeight || y<=0)vy=-1*vy;}var dt = setInterval('move()',100);one.onmouseover=function(){clearInterval(dt)}one.onmouseout=function(){dt=setInterval('move()',100);}</script></body></html>

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