js的cookie记住用户名

来源：互联网发布：剑三藏剑成男捏脸数据编辑：程序博客网时间：2024/05/21 18:21
<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>cookie</title><meta name="description" content=""><meta name="keywords" content=""></head><body> <script> //1、cookie的使用：document.cookie = 'key=value';可以同时设置多个 // document.cookie="username=longzhoufeng"// document.cookie="age=03"//2、cookie的过期时间：document.cookie = '名称=值;expires=' + 字符串格式的时间;// var  myDate=new Date()// myDate.setDate(myDate.getDate()+3)// document.cookie="mynameis="+encodeURI("longzhoufeng")+ ";expires="+myDate.toGMTString();// document.cookie="age=30"// console.log(decodeURI(document.cookie))// 解码后输出结果如下：//mynameis=longzhoufeng; age=30//3、把上面的封装成一个函数,其中有三个参数是在变化的，key值，value值，T时间function setCookie(key,value,t){    var  myDate=new Date()    myDate.setDate(myDate.getDate()+t)    document.cookie=key+"="+value+ ";expires="+myDate.toGMTString();}function getCookie(key){    var arr1 = document.cookie.split('; ');    for (var i=0; i<arr1.length; i++) {        var arr2 = arr1[i].split('=');        if ( arr2[0] == key ) {            return decodeURI(arr2[1]);        }    }}function removeCookie(key) {    setCookie(key, '', -1);}// setCookie("myName","longzhoufeng",1)// console.log(getCookie("myName"))// console.log(removeCookie("myName"))// alert(typeof myDate)// 必须将时间格式转换成字符形式// alert(typeof myDate.toGMTString());//4、内容最好编码存放,encodeURI//alert( encodeURI('你好') );//alert( decodeURI('%E4%BD%A0%E5%A5%BD') ) </script> <script>window.onload = function() {    var oUsername = document.getElementById('username');    var oLogin = document.getElementById('login');    var oDel = document.getElementById('del');    if ( getCookie('username') ) {        oUsername.value = getCookie('username');    }    oLogin.onclick = function() {        alert('登陆成功');        setCookie('username', oUsername.value, 5);    }    oDel.onclick = function() {        removeCookie('username');        oUsername.value = '';    }} </script>    <input type="text" id="username" />        <input type="button" value="登陆" id="login" />        <input type="button" value="删除" id="del" /></body></html>
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