/*** *读取指定的Cookie值 readCookie("id"); *@param {string} cookieName Cookie名称 */ function readCookie(cookieName) { var theCookie = "" + document.cookie; var ind = theCookie.indexOf(cookieName); if(ind==-1 || cookieName=="") return ""; var ind1 = theCookie.indexOf(';',ind); if(ind1==-1) ind1 = theCookie.length; /*读取Cookie值*/ return unescape(theCookie.substring(ind+cookieName.length+1,ind1)); } /*** * 设置Cookie值 setCookie("id",1); * @param {string} cookieName Cookie名称 * @param {string} cookieValue Cookie值 * @param {number} nDays Cookie过期天数 */ function setCookie(cookieName, cookieValue) { /*当前日期*/ var today = new Date(); /*Cookie过期时间*/ var expire = new Date(); /*如果未设置nDays参数或者nDays为0，取默认值1*/ //if(nDays == null || nDays == 0) nDays = 1; /*计算Cookie过期时间【 3600000 * 24 为一天】*/ expire.setTime(today.getTime() + 400000); //5分钟 document.cookie = cookieName + "=" + escape(cookieValue) + ";expires=" + expire.toGMTString(); } /*** * 删除cookie中指定变量函数 * @param {string} $name Cookie名称 */ function deleteCookie($name){ var myDate=new Date(); myDate.setTime(-1000);//设置时间 document.cookie=$name+"=''; expires="+myDate.toGMTString(); } /*** * 删除cookie中所有定变量函数 * @param {string} cookieName Cookie名称 * @param {string} cookieValue Cookie值 * @param {number} nDays Cookie过期天数 */ function clearCookie(){ var myDate=new Date(); myDate.setTime(-1000);//设置时间 var data=document.cookie; var dataArray=data.split("; "); for(var i=0;i<dataArray.length;i++){ var varName=dataArray[i].split("="); document.cookie=varName[0]+"=''; expires="+myDate.toGMTString(); } }
附：JS操作cookie的小插件
var CookieUtil = { // 设置cookie set : function (name, value, expires, domain, path, secure) { var cookieText = ""; cookieText += encodeURIComponent(name) + "=" + encodeURIComponent(value); if (expires instanceof Date) { cookieText += "; expires=" + expires.toGMTString(); } if (path) { cookieText += "; path=" + path; } if (domain) { cookieText += "; domain=" + domain; } if (secure) { cookieText += "; secure"; } document.cookie = cookieText; }, // name=value; expires=expiration_time; path=domain_path; domain=domain_name; secure // 获取cookie get : function (name) { var cookieName = encodeURIComponent(name) + "=", cookieStart = document.cookie.indexOf(cookieName), cookieValue = ""; if (cookieStart > -1) { var cookieEnd = document.cookie.indexOf (";", cookieStart); if (cookieEnd == -1) { cookieEnd = document.cookie.length; } cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd)); } return cookieValue; }, // 删除cookie unset : function (name, domain, path, secure) { this.set(name, "", Date(0), domain, path, secure); } };
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