/**
 * 获取超时
 * @param key: 超时id
 * @param outTime: 超时时间(单位:分钟)
 * retun true:未超时 , false:超时
 */
$.timeOut = function(key , outTime){
    outTime = outTime || 30;
    var lastTime = $.store.get(key);
    var date = new Date($.ajax({async: false}).getResponseHeader("Date"));
    var time= date.getTime();
    $.store.set(key , time);
    if(lastTime){
        var intervalTime = (time - lastTime) / 1000 / 60;
        if(intervalTime > outTime){
            return false;
        }
    }else{
        return false;
    }
    return true;
}