复制代码 代码如下:

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。