js 浏览器写coke

/*设置cookie*/
function setCookie(name, value, Days) {
if (Days == null || Days == '') {
Days = 300;
}
var exp = new Date();
exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
document.cookie = name + "=" + escape(value) + "; path=/;expires="
+ exp.toGMTString();
}


/* 获取cookie */
function getCookie(name) {
var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
if (arr = document.cookie.match(reg))
return unescape(arr[2]);
else
return null;
}