JavaScript Cookie操作

function setCookie(NameOfCookie, value, expiredays)

             {

                var ExpireDate = new Date ();

                ExpireDate.setTime(ExpireDate.getTime() + (expiredays  24  3600 * 1000));

                document.cookie = NameOfCookie + "=" + escape(value) +

                ((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());

             }


         function getCookie(NameOfCookie)  
         {  
            if (document.cookie.length > 0)  
             {  
                 begin = document.cookie.indexOf(NameOfCookie+"=");  
                 if (begin != -1)     
                 {  
                     begin += NameOfCookie.length+1;//cookie值的初始位置  
                     end = document.cookie.indexOf(";", begin);//結束位置  
                     if (end == -1) end = document.cookie.length;//沒有;則end為字符串結束位置 
                     document.write(document.cookie.substring(begin, end));
                     return unescape(document.cookie.substring(begin, end));
                 }  
                 }
                 return null;   
         }

         function delCookie (NameOfCookie)  
          {  
              if (getCookie(NameOfCookie))
               {  
                  document.cookie = NameOfCookie+"="+";expires=Thu, 01-Jan-70 00:00:01 GMT";  
               }  
          }</pre>