js 读写Cookie

我的广告单元，有空点一下哦，谢谢！

function SetCookie(name,value)
{
    var Days = 30; //此 cookie 将被保存 30 天
    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 = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null) return unescape(arr[2]); return "ext-all.css";

}

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();    
}