/**
 * 兼容
 */
if (!Array.prototype.indexOf){
    Array.prototype.indexOf = function(elt /*, from*/){
        var len = this.length >>> 0;

        var from = Number(arguments[1]) || 0;
        from = (from < 0)
            ? Math.ceil(from)
            : Math.floor(from);
        if (from < 0)
            from += len;

        for (; from < len; from++){
            if (from in this && this[from] === elt)
                return from;
        }
        return -1;
    };
}

/**
 * 是否可以加载展示
 * @param field
 * @param currentValue
 * @returns {boolean}
 * @ DEMO loadable('categoryList','2');
 */
function loadable(field,currentValue) {
    if(!currentValue){
        return true
    }
    if($.cookie(field)){
        if($.cookie(field).indexOf(currentValue) > -1){
            return false;
        }else{
            var list = Array($.cookie(field));
            list.push(currentValue);
            todayCookie(field,list);
            return true;
        }
    }else{
        var list = [];
        list.push(currentValue);
        todayCookie(field,list);
        return true;
    }
}

/**
 * cookie 当天过期
 * @param key
 * @param value
 */
function todayCookie(key,value) {
    var curDate = new Date();
    var curTamp = curDate.getTime();
    var curWeeHours = new Date(curDate.toLocaleDateString()).getTime() - 1;
    var passedTamp = curTamp - curWeeHours;
    var leftTamp = 24 * 60 * 60 * 1000 - passedTamp;
    var leftTime = new Date();
    leftTime.setTime(leftTamp + curTamp);
    $.cookie(key, value , {expires: leftTime, path: '/'});
}