var cookieString = new String(documents.cookie) var cookieHeader = 'xvlink_pop=' //更换xvlink_pop为任意名称 var beginPosition = cookieString.indexOf(cookieHeader) if (beginPosition <0){ window.open('http://www.***.com/***.html','','top=0,left=0,width=230,height= 768,toolbar=yes,menubar=yes,scrollbars=yes,resizable=yes,location=yes,status=yes'); var Then = new Date() Then.setTime(Then.getTime() + 12*60*60*1000 ) //同一ip设置过期时间,即多长间隔跳出一次 documents.cookie = 'xvlink_pop=yes;eXPires='+ Then.toGMTString() //更换xvlink_pop和第4行一样的名称 }