复制代码 <script> //设置cookie function setCookie(cname, cvalue, exdays) { var d = new Date(); d.setTime(d.getTime() + (exdays*24*60*60*1000)); var expires = "expires="+d.toUTCString(); document.cookie = cname + "=" + cvalue + "; " + expires; } //获取cookie function getCookie(cname) { var name = cname + "="; var ca = document.cookie.split(‘;‘); for(var i=0; i<ca.length; i++) { var c = ca[i]; while (c.charAt(0)==‘ ‘) c = c.substring(1); if (c.indexOf(name) != -1) return c.substring(name.length, c.length); } return ""; } //清除cookie function clearCookie(name) { setCookie(name, "", -1); } function checkCookie() { var user = getCookie("username"); if (user != "") { alert("Welcome again " + user); } else { user = prompt("Please enter your name:", ""); if (user != "" && user != null) { setCookie("username", user, 365); } } } checkCookie(); </script> 复制代码 第二种:
function addCookie(objName, objValue, objHours){//添加cookie var str = objName + "=" + escape(objValue); if (objHours > 0) {//为0时不设定过期时间,浏览器关闭时cookie自动消失 var date = new Date(); var ms = objHours * 3600 * 1000; date.setTime(date.getTime() + ms); str += "; expires=" + date.toGMTString(); } document.cookie = str; alert("添加cookie成功"); }
function getCookie(objName){//获取指定名称的cookie的值 var arrStr = document.cookie.split("; "); for (var i = 0; i < arrStr.length; i++) { var temp = arrStr[i].split("="); if (temp[0] == objName) return unescape(temp[1]); } }
function delCookie(name){//为了删除指定名称的cookie,可以将其过期时间设定为一个过去的时间 var date = new Date(); date.setTime(date.getTime() - 10000); document.cookie = name + "=a; expires=" + date.toGMTString(); }
function allCookie(){//读取所有保存的cookie字符串 var str = document.cookie; if (str == "") { str = "没有保存任何cookie"; } alert(str); }
function $(m, n){ return document.forms[m].elements[n].value; }
function add_(){ var cookie_name = $("myform", "cookie_name"); var cookie_value = $("myform", "cookie_value"); var cookie_expireHours = $("myform", "cookie_expiresHours"); addCookie(cookie_name, cookie_value, cookie_expireHours); }
function get_(){ var cookie_name = $("myform", "cookie_name"); var cookie_value = getCookie(cookie_name); alert(cookie_value); }