js对cookie增删改查的封装

/**

 * 获取cookie

 * @param name

 * @returns {*}

 */

function getCookie(name) {

    var cookieArr = document.cookie.split("; ");//使用"; "分割Cookie

    var cva = [], temp;

    //循环的得到Cookie名称与值

    for (i = 0; i < cookieArr.length; i++) {

        temp = cookieArr[i].split("=");//用"="分割Cookie的名称与值

        cva[temp[0]] = unescape(temp[1]);

    }

    if (name) {

        //如果有name则输出这个name的Cookie值

        return cva[name];

    }

    else{

        //如果没有name则输出空数组

        return cva;

    }

}

/**

 * 保存cookie（保存时间为30天）

 * @param name

 * @param value

 */

function setCookie(name, value) {

    var Days = 30;

    var exp = new Date();

    exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);

    document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString() + ";path=/";

}

/**

 * 删除cookie

 * @param name

 */

function delCookie(name) {

    var exp = new Date();

    exp.setTime(exp.getTime() - 1);

    var cval = getCookie(name);

    if (cval != null){

        document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString() + ";path=/";

    }

}