JavaScript对Cookie的操作-设置Cookie、获得Cookie、删除Cookie

设置cookie     function setcookie(name,value)     {          var Days = 30;          var exp  = new Date();          exp.setTime(exp.getTime() + Days*24*60*60*1000);          document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();         //alert(document.cookie);      }     获取cookie     function getcookie(name)     {            var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));            if(arr != null)         {                return unescape(arr[2]);            }         else         {                return "";            }        }           删除cookie     function delcookie(name)     {            var exp = new Date();             exp.setTime(exp.getTime() - 10000);            document.cookie = name + "=a; expires=" + exp.toGMTString();             }