js cookie 最近浏览

 

function SetCookie(name, value) {
    var days = 30; //保留30天
    var exp = new Date();
    exp.setTime(exp.getTime() + days * 24 * 60 * 60 * 1000);
    var oldCookie = getCookie(name);
    alert("oldCookie is:" + oldCookie);
    if (oldCookie != null) {  //如果cookie已有值，检查是否重复和个数
        eval('a=' + value);
        var newCookie = value;
        var count = 0;
        var cookieValueBeginIndex = oldCookie.indexOf("{");
        for (var i = 0; i < oldCookie.length; ) {
            var j = cookieValueBeginIndex;
            for (; oldCookie.charAt(j) != "}"; j++)
            { }
            cookieValueEndIndex = j + 1;
            var subOldCookie = oldCookie.substring(cookieValueBeginIndex, cookieValueEndIndex);
            cookieValueBeginIndex = cookieValueEndIndex;
            eval('b=' + subOldCookie);
            if (a.goodsId != b.goodsId) {
                alert("要添加");
                newCookie += subOldCookie;
                count++;
                if (count == 3) {
                    return;
                }
            }
            i = cookieValueEndIndex;
        }
        alert("newCookie is:" + newCookie);
        document.cookie = name + "=" + escape(newCookie) + ";expires=" + exp.toGMTString();
    }
    else { //如果该名字的cookie值为空，创建cookie。
        document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
    }
}
function getCookie(name)//取cookie
{
    var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
    if (arr != null)
        return unescape(arr[2]);
    return null;
}
function delCookie(name)//删除cookie
{
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval = getCookie(name);
    if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
}
function getgoodsinfo() {
    var ogoods = getCookie("shopId01");
    eval('a=' + ogoods);
    alert(a.img);
}
SetCookie("shopId01", "{ goodsId:789,img: 'http://ime.baidu.com'}"); //设置商品cookie
delCookie("shopId01");
function getgoodsinfo() {
    var ogoods = getCookie("goodsinfo");
    eval('a=' + ogoods);
    alert(a.img);
}