Javascript 中如何存储，获取和删除 Cookies。
代码语言：javascript复制function setCookie(name,value){
var exp = new Date();
exp.setTime(exp.getTime() 30*24*60*60*1000);
document.cookie = name "=" escape (value) ";expires=" exp.toGMTString();
}
function getCookie(name){
var arr = document.cookie.match(new RegExp("(^| )" name "=([^;]*)(;|$)"));
if(arr != null) return unescape(arr[2]); return null;
}
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();
}
