JS操作cookies方法

//JS操作cookies方法!

function delCookie(name){var exp = new Date();exp.setTime(exp.getTime() - 1);var cval=getCookie(name);if(cval!=null)document.cookie= name + "="+cval+";expires="+exp.toGMTString();}//写cookiesfunction setCookie(name,value){var Days = 30;var exp = new Date();exp.setTime(exp.getTime() + Days*24*60*60*1000);document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();}function getCookie(name){    var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");    if(arr=document.cookie.match(reg))        return unescape(arr[2]);    else        return null;}setCookie("username",'jack');var username = getCookie('username');console.log(username);//使用示例setCookie("name","hayden");alert(getCookie("name"));