cookie封装

设置cookie
function setCoolie(name, value, time) {

    var oDate = new Date();

    oDate.setDate(oDate.getDate() + time);

    document.cookie = name + '=' + value + ';expires' + oDate;

}

获取cookie

function getCookie(key) {   

    var arr = document.cookie.split(';');

    for(var i = 0,len = arr.length; i < len; i ++) {

        var temp = arr[i].split('=');

        if (temp[i] == key) {

            return temp[1];

        }

    }

}

删除cookie

function deleteCookie(key){

    //setCookie(key,'',-1)

    document.cookie=key+"='';expires="+(-1);

}