js cookie使用

    if (window.localStorage) {
       window.localStorage.setItem('cname', "cvalue");
    }else{
        setCookie("cname","cvalue",5);
    }

    //设置cookie
    function setCookie(cname, cvalue, hours) {
        var d = new Date();
        d.setTime(d.getTime() + (hours * 60 * 1000));
        var expires = "expires=" + d.toUTCString();
        document.cookie = cname + "=" + cvalue + "; " + expires;
    }
    //获取cookie
    function getCookie(cname) {
        var name = cname + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') c = c.substring(1);
            if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
        }
        return "";
    }