js 读写Cookie

我的广告单元，有空点一下哦，谢谢！

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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();    }