var cookie=
{
    Get:function(n)
    {
        var re=new RegExp(n+'=([^;]*);?','gi');
        var r=re.exec(document.cookie)||[];
        return (r.length>1?r[1]:null)
    },

    //写入COOKIES,n为Cookie名，v为value

    Set:function(n,v,e,p,d,s)
    {
        var t=new Date;
        if(e)
        {
          t.setTime(t.getTime() + (e*3.6e6));
        }
        document.cookie=n+'='+v+'; '+(!e?'':'; expires='+t.toUTCString())+(!p?'':'; path='+p)+(!d?'':'; domain='+d)+(!s?'':'; secure') // Set cookie
    },

    Del:function(n,p,d)
    {
        document.cookie=n+'='+(!p?'':'; path='+p)+(!d?'':'; domain='+d)+'; expires=Thu, 01-Jan-70 00:00:01 GMT';
    },
    
    clearCookie:function(c_name){
     var value="";
     var Days = 30; 
     var exp  = new Date(); 
     exp.setTime(exp.getTime() - Days*24);
     document.cookie=c_name+ "=" +escape(value) + ";expires=" + exp.toGMTString();
  }
};