js-cooke封装

//cookie设置和获取
var Cookies = function(){
    this.setCookie = function (name,value,time){
        var expires = "";
        if(time>0){
            expires = ";expires=" + time;
        }
        console.log(name + "="+ escape (value) + expires);
        document.cookie = name + "="+ escape (value) + expires;

    },
    this.getCookie = function(name){
        var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
             arr = document.cookie.match(reg);
             //console.log(arr)
             if(arr == null){
                 return false;
             }
        return arr[2];
    }
    this.delCookie = function(name){
        var exp = new Date();
        exp.setTime(exp.getTime() - 1);
        var cval=this.getCookie(name);
        if(cval!=null){
            document.cookie= name + "="+cval+";expires="+exp.toGMTString();
        }
    }
}