Cookie操作类2（js）

     < script >
function  eyunCookie()
  { this .key = "" ; // 初始化key。
    this .value = "" ; // 初始化key's value。
    this .expires = 0 ; // 初始化cookie的有效时间，单位毫秒。
      this .init = function () // 对象初始化
                 { this .key = "" ;
                 this .value = "" ;
                 this .expires = 0 ;
                              }
    this .set = function (key,value,expires) // 设置cookie
              { if ( this .key == "" ) this .key = key;
                              if ( this .value == "" ) this .value = value;
                              if ( this .expires <= 0 ) this .expires = expires;
                              if ( this .key == "" || typeof ( this .key) != " string " )
                 {alert( " 请先设置欲保存的cookie名称！ " );
                                   this .init();
                   return   false ;
                 }
                if ( this .key.match( / [,; ] / ))
                 {alert( " cookie名称中不能包含“,”、“;”或空格！ " );
                                   this .init();
                   return   false ;
                 }
                if ( this .value.toString().match( / [,; ] / ) || typeof ( this .value) == " undefined " )
                 {alert( " cookie值中不能包含“,”、“;”或空格！ " );
                                   this .init();
                   return   false ;
                 }
                if ( this .expires <= 0 || typeof ( this .expires) != " number " )
                 {alert( " 请先正确设置cookie的有效时间！ " );
                                   this .init();
                   return   false ;
                 }
                var  cookie = document.cookie;
                if (cookie.indexOf( this .key + " = " ) !=- 1 )
                 { if ( ! confirm( " 欲保存的cookie名称已经存在，是否要进行替换？ " ))
                                    { this .init();
                                          return   false ;
                                        }                    
                 }
                var  dt = new  Date();
               dt.setTime(dt.getTime() + this .expires);
                             document.cookie = this .key + " = " + this .value + " ;expires= " + dt.toGMTString();
                              this .init();
                return   true ;
              }
    this .get = function (key) // 取得名为key的cookie的值
              { if (key == "" || key.match( / [,; ] / ))
                 {alert( " 请正确设置欲查找的cookie名称！ " )
                   return   false ;
                 }
                var  cookie = document.cookie;
                var  start = cookie.indexOf(key + " = " );
                if (start ==- 1 )
                 {alert( " 欲查找的cookie不存在！ " )
                   return   false ;
                 }
                var  end = cookie.indexOf( " ; " ,start);
                              if (end ==- 1 )
                               end = cookie.length;
                var  getCookie = cookie.substring(start + key.length + 1 ,end);
               alert( " cookie： " + key + " 的值为 " + getCookie);
                return  getCookie;
              }
    this .showAll = function (){alert( " 共有以下cookie对：\n " + document.cookie.split( " ; " ).toString().replace( / , / g, " \n " ));} // 显示所有cookie
    this .del = function (key) // 删除名为key的cookie
              { if (key == "" || key.match( / [,; ] / ))
                 {alert( " 请正确设置欲删除的cookie名称！ " )
                   return   false ;
                 }
                              var  dt = new  Date();
               dt.setTime(dt.getTime());
                             document.cookie = key + " =eyunDelete;expires= " + dt.toGMTString();
                              this .init();
                return   true ;
              }
    this .destroy = function () // 销毁所有cookie
                    { var  dt = new  Date();
                   dt.setTime(dt.getTime());
                                      while (document.cookie != "" )
                                       document.cookie = document.cookie + " ;expires= " + dt.toGMTString();
                                      this .init();
                                      return   true
                                    }
  }
var  cookieTest = new  eyunCookie()
function  settest()
{cookieTest.key = " test "
 cookieTest.value = " ok "
 cookieTest.expires = 31536000000
 cookieTest.set()
}
</ script >
< input type = button onclick = cookieTest.showAll() value = read >< input type = button onclick = " cookieTest.set('a','test',31536000000) "  value = setA >< input type = button onclick = " settest(); "  value = setTest >< input type = button onclick = " cookieTest.destroy() "  value = clear >< input type = button onclick = cookieTest.get( " test " ) value = gettest >< input type = button onclick = cookieTest.get( " a " ) value = geta >< input type = button onclick = cookieTest.set( " test " , 1 , 31536000000 ) value = resetTest >< input type = button onclick = cookieTest.del( " test " ) value = delTest >