//首页进入广告代码
(function(){
$(".pop_up h2") .click(function(){
$(".pop_up") .fadeOut();
$(".body_bg") .fadeOut();
});
window.onload=loadpopup();
var cookieString = new String(document.cookie)
function openwin(){
$(".pop_up") .fadeIn();
$(".body_bg") .fadeIn();
}
$(".pop_up h2") .click(function(){
$(".pop_up") .fadeOut();
$(".body_bg") .fadeOut();
});
function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
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;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}
function loadpopup(){
if (get_cookie('cookieString')==''){
openwin();
document.cookie="cookieString=yes"
}
}
})();
来源：https://www.cnblogs.com/noonka/p/10579954.html