如何实现网站中存取删除cookie的功能操作？

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javascript// 存储cookie函数function setCookie(cookieName, cookieValue, days) { var expire=new Date(); expire.setTime(expire.getTime() + days * 24 * 60 * 60 * 1000); document.cookie=cookieName + = + cookieValue + ;expires= + expire.toUTCString();}

// 获取cookie函数function getCookie(cookieName) { var name=cookieName + =; var decodedCookie=decodeURIComponent(document.cookie); var ca=decodedCookie.split(';'); for(var i=0; i

// 删除cookie函数function delCookie(cookieName) { document.cookie=cookieName + '=; Max-Age=-99999999;';}

cookie.js

/* * cookieName：存的值名字 * cookieVal： 存的值 * lasttime： 过期时间 * 使用方法: setCookie('friend', '大表哥', 2.5 * 60 * 1000); * getCookie("friend"); * delCookie ('friend'); */ //存储cookie function setCookie(cookieName, cookieVal, lasttime) { var time = new Date().getTime(); //获取当前的日期时间 if (lasttime) { time += lasttime; } else { //15分钟过期 time += 15 * 60 * 1000; } time = new Date(time); //再加上一个编码 document.cookie = cookieName + "=" + cookieVal + ";expires=" + time + ';path=/'; } //取cookie，如果没有返回null function getCookie(cookieName) { var strs = document.cookie; //获取所有cookie var cookies = strs.split('; '); //将cookie字符串拆分数组 for (var i = 0; i < cookies.length; i++) { if (cookies[i].indexOf(cookieName + '=') === 0) { //代表存在一个cookie return cookies[i].split('=')[1]; } } } //删除cookie function delCookie(name) { var exp = new Date(); exp.setTime(exp.getTime() - 60 * 60 * 1000); var cval = getCookie(name); if (cval !== null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString() + ";path=/"; }