js操作cookie

function getCookie(name)
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
    if(arr != null) return unescape(arr[2]); return null;
}
function setCookie(name,value)
{
    var exp = new Date();
    exp.setTime(exp.getTime()+365*24*60*60*1000);
    document.cookie = name+"="+escape(value)+";expires="+exp.toGMTString();
}