當登錄次數達到三次，就自動調用函數，隱藏彈出框。下面是具體的實現，感興趣的朋友可以參考下
代碼如下: function www_helpor_net(offset) { var endstr = document.cookie.indexOf(";", offset); if (endstr == -1) endstr = document.cookie.length; return unescape(document.cookie.substring(offset, endstr)); } function GetCookie(name) { var arg = name + "="; var alen = arg.length; var clen = document.cookie.length; var i = 0; while (i < clen) { var j = i + alen; if (document.cookie.substring(i, j) == arg) return www_helpor_net(j); i = document.cookie.indexOf(" ", i) + 1; if (i == 0) break; } return null; } function SetCookie(name, value) { var argv = SetCookie.arguments; var argc = SetCookie.arguments.length; var expires = (2 < argc) ? argv[2] : null; var path = (3 < argc) ? argv[3] : null; var domain = (4 < argc) ? argv[4] : null; var secure = (5 < argc) ? argv[5] : false; document.cookie = name + "=" + escape(value) + ((expires == null) ? "" : ("; expires=" + expires .toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : ""); } var expdate = new Date(); var visits; expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000 * 365)); //設置COOKIES時間為1年,自己隨便設置該時間 if (!(visits = GetCookie("visits"))) { visits = 0; } var oldjessionid = GetCookie("OLDJSESSIONID"); if (!oldjessionid) { oldjessionid = "111"; } var newjessionid = GetCookie("JSESSIONID"); if (oldjessionid != newjessionid) { visits++; SetCookie("OLDJSESSIONID", newjessionid, expdate, "/", null, false); SetCookie("visits", visits, expdate, "/", null, false); } //以下信息顯示可以使用標准的HTML語法,自己隨便設置 document.write("你已經光臨本頁" + "<FONT COLOR=red>" + visits + "</FONT>"+ "次！"); //當登錄次數達到三次，就自動調用函數，隱藏彈出框，如果只要記錄登錄次數，下邊代碼可以忽略 if (visits > 3) { setInterval("changeH('down')", 2); } */