代碼如下圖，我是想第一次進(jìn)入網(wǎng)站是進(jìn)入歡迎頁的，第二次以后就進(jìn)入網(wǎng)站主頁了，但一關(guān)閉瀏覽器cookie就沒了，又得進(jìn)入歡迎頁。請教一下如何設(shè)置這個(gè)cookie的保存時(shí)間，如1個(gè)月，這一個(gè)月內(nèi)如果不是手動(dòng)清除cookie的話都是進(jìn)入網(wǎng)站主頁。<SCRIPT language="JavaScript">function GetCookie(Name){var search = Name + "="var Cookie =document.cookie;if (Cookie.length <= 0 )return "";// cookie 不存在,返回空值if (Cookie.indexOf(search)==-1)return "";// 'visited' 不存在,返回空值start = Cookie.indexOf(search)+ search.length//"visited=yes"起始位置索引值end = Cookie.indexOf(";", start);//"visited=yes"終止位置索引值if (end == -1);//";"不存在end = Cookie.length;return unescape(Cookie.substring(start, end))}function SetCookie(){if (GetCookie('visited')==''){document.cookie="visited=yes"document.location.href="index.html";//修改為首頁 }}SetCookie()</SCRIPT>