求大神们帮忙看下这段 代码 和算法
</script><script type="text/javascript">
function closeTop(day) {
document.getElementById("topFloat").style.display = "none";
document.getElementById("top_hidden").style.display="none";
SetCookie_top('dd_top_url', '1', day);
}
function SetCookie_top(name, value, day)
{
var exp = new Date();
exp.setTime(exp.getTime() + parseInt(day) * 24 * 60 * 60 * 1000);
document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString() + ";path=/;domain=
}
function getCookie_top(name)//取cookies函数
{
var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
if (arr != null) return unescape(arr[2]); return null;
}
function showSiteTop(i) {
if (i < 70) {
var hh = i - 70;
document.getElementById("topFloat").style.top = hh + "px";
i = i + 1;
setTimeout("showSiteTop(" + i + ")", 30);
}
}
var mob_status = 1;
//alert(vip_level);
if(mob_status != 1){
if (getCookie_top('dd_top_url') != 1) {
//showSiteTop(0);
document.getElementById("topFloat").style.display = "";
document.getElementById("top_hidden").style.display="";
}
}
function showSiteTop2(i) {
if (i <= 22) {
i++;
setTimeout("showSiteTop2(" + i + ")", 50);
}
