function jb51tuitan(){
if (getCookie('jb51popped')==''){
//要执行的代码或一些操作
setCookie("jb51popped","ok"); //写入cookies表示已经执行过了。
alert("ok");
}
}
jb51tuitan()
function setCookie(name, value)
{
var argv = setCookie.arguments;
var argc = setCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
if(expires!=null)
{
var LargeExpDate = new Date ();
LargeExpDate.setTime(LargeExpDate.getTime() (expires*1000*3600*24));
}
document.cookie = name "=" escape (value) ((expires == null) ? "" : ("; expires=" LargeExpDate.toGMTString()));
}
function getCookie(Name)
{
var search = Name "="
if(document.cookie.length > 0)
{
offset = document.cookie.indexOf(search)
if(offset != -1)
{
offset = search.length
end = document.cookie.indexOf(";", offset)
if(end == -1) end = document.cookie.length
return unescape(document.cookie.substring(offset, end))
}
else return ""
}
}
把想要输出的内容，放到jb51tuitan()函数里面的判断语句里面即可。