网页头部弹出广告，定时消失

<mce:script type="text/javascript" language="javascript"><!-- var time = 500; var h = 0; function addCount() { if(time>0) { time--; h = h+5; } else { return; } if(h>120) //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); //停留时间自己适当调整 } // --></mce:script> <mce:script type="text/javascript" language="javascript"><!-- var T = 120; var N = 120; //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); } // --></mce:script>

 

 

 

<div id="ads" style="margin:auto; display:none; overflow:hidden" mce_style="margin:auto; display:none; overflow:hidden" align="center"> <div align="center"> <table border="0" width="778" cellpadding="0" bgcolor="#000000" style="border-collapse: collapse" mce_style="border-collapse: collapse" height="120" bordercolor="#C0C0C0"> <tr> <td> <p align="center"> <font color="#FFFF00"><b>Shipping notice</b><br/> As the Chinese Spring Festival holiday, we have a new shipping notice. All the products you buy after January 23rd, 2011, we will not dispatch them until 10th February, 2011. Sorry for the inconvenience that we caused. And thank you for your understanding. </font></td> </tr> </table> </div> </div>