JavaScript Cookie操作详解编程语言

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);//结束位置   
                         if (end == -1) end = document.cookie.length;//没有;则end为字符串结束位置  
                         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";   
                   }   
              }