复制代码 代码如下:

<script type="text/javascript">

var time = 300;

var h = 0;

function addCount()

{

if(time>0)

{

time--;

h = h+5;

}

else

{

return;

}

if(h>300) //高度

{

return;

}

document.getElementById("ads").style.display = "";

document.getElementById("ads").style.height = h+"px";

setTimeout("addCount()",30);

}

window.onload = function showAds()

{

addCount();

setTimeout("noneAds()",7000); //停留时间自己调了

}

var T = 300;

var N = 300; //高度

function noneAds()

{

if(T>0)

{

T--;

N = N-5;

}

else

{

return;

}

if(N<0)

{

document.getElementById("ads").style.display = "none";

return;

}

document.getElementById("ads").style.height = N+"px";

setTimeout("noneAds()",30);

}

</script>

复制代码 代码如下:

<div id="ads">查字典教程网_www.jb51.net</div>