window.onload = function(){
var fudongad = document.getelementbyid("headads");
settimeout("noneheadads()", 3000); //停留时间自己适当调整
}
var height2 = 339; //高度
function noneheadads() {
height2 = height2 - 10;
if (height2 <= 0) {
document.getelementbyid("headads").style.display = "none";
return;
}
document.getelementbyid("headads").style.height = height2 + "px";
settimeout("noneheadads()", 40);
}
[ctrl+a 全选 注:如需引入外部js需刷新才能执行]