[php学习十五]javaScript的基本练习5-Cookie

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<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>JavaScript的Cookie操作</title>    <script>        function setCookie(key,value,exdays) {            var d = new Date();            /*注意点1:这里是以毫秒为单位*/            d.setTime(d.getTime() + exdays * 24 * 60 * 60 *1000);            var expires = "expires = " + d.toUTCString();            /*注意点2:设置后,并没有影响其他键值对,是添加的效果。~*/            document.cookie = key + "=" + value + ";" + expires;        }        function deleteCookie(key) {            setCookie(key,"",-1);        }        function getCookie(key) {            var skey = key + "=";            var arrKeyValue = document.cookie.split(';');            for (var i = 0; i < arrKeyValue.length; i ++){                var c = arrKeyValue[i].trim();                if (c.indexOf(skey) == 0) return c.substring(key.length + 1, c.length);            }            return "";        }        function checkCookie(key) {            var c = getCookie(key);            if (c != null && c != ''){                alert("Cookie已经存在:" + key + "=" + c);            }            else{               c = window.prompt("请输入" + key + "的值","");                if (c != null && c != ''){                    setCookie(key,c,1);                }            }        }        function showCookie() {            alert("当前Cookie为:" + document.cookie);        }    </script></head><body><p><small>显示当前的Cookie</small></p><button onclick="showCookie()">点我显示</button><hr><p><small>设置Cookie的内容为:userName = Liyanq </small></p><button onclick="setCookie('userName','Liyanq',1)">点我设置</button><hr><p><small>删除Key为userName的Cookie</small></p><button onclick="deleteCookie('userName')">点我删除</button><hr><p><small>获取Key为userName的Cookie</small></p><button onclick="alert(getCookie('userName'))">点我获取</button><hr><p><small>监测Key为userNmae的Cookie</small></p><button onclick="checkCookie('userName')">点我监测</button></body></html>
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