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<html xmlns="http://www.w3.org/1999/xhtml" ><head><meta charset="utf-8"><title>页面首次访问判断</title></head><body> <h1><a href="abbykk.github.io">GO</a></h1> <script language ="javascript" type ="text/javascript" > //1浏览器关闭则window.name为空,可以实现跨域,数据传递 // alert((window.name == "" ? "是" : "不是") + "第一次开这个窗口!") // window.name = "00";//2cookie判断function setCookie(cname,cvalue,exdays){var d = new Date();d.setTime(d.getTime()+(exdays*24*60*60*1000));var expires = "expires="+d.toGMTString();document.cookie = cname + "=" + cvalue + "; " + expires;}function getCookie(cname){var name = cname + "=";var ca = document.cookie.split(';');for(var i=0; i<ca.length; i++) { var c = ca[i].trim(); if (c.indexOf(name)==0) return c.substring(name.length,c.length);}return "";}function checkCookie(){var user=getCookie("username");if (user!="") { //不是首次访问 alert("Welcome again " + user); }else { //首次访问 user = prompt("Please enter your name:",""); if (user!="" && user!=null) { setCookie("username",user,2/(3600*24)); } }}window.onload=function(){ checkCookie()} </script></body></html>