学习cookie的创建,和检查浏览器是否获取到了cookie,例子就是w3cschool上面的例子,只是在使用过程中发现,firefox获取到了cookie的值,但是,google却没有。于是,查了很多资料,发现很多人碰到了相同的问题,才知道,google在本地页面是不会保存cookie的,于是又添加了一段,显示cookie的值来验证,google是否保存本地页面的cookie这一说法。
<script type="text/javascript"> //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 ""; } 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 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>
<body > <input type="button" value="读取所有cookie" onclick="allCookie()"/> </body>
© hanhaisha.com. All Rights Reserved 湘ICP备15009704号-1
梦里不知岁月匆、梦醒不知韶华过