取某個cookie種的數(shù)據(jù)

    function getCookie (name) {
        var str = document.cookie;
        var arrStr=str.split("; ")  
        //遍歷數(shù)組
        for (var i = 0; i < arrStr.length; i++) {
            console.log(arrStr[i]); 
            var arr=arrStr[i].split("=")
            console.log(arr);
            if(arr[0]==name){
                return arr[1]
            }
        }
    }

//存某個cookie數(shù)據(jù)

    function setCookie (name,val,time) {        
        //存的名稱name,存的值val,存的天數(shù)time(過期時間)
        var oDate = new Date();
        oDate.setDate(oDate.getDate()+time);   
        document.cookie=name+"="+val+";expires="+oDate;//過期時間           
    }

刪除指定的數(shù)據(jù),如何讓cookie失效（過期）

    function removeCookie(name){
        setCookie(name,"",-1);
    }