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>