与网上广为流传的特权方法有所不同，这里是使用闭包来实现的。并以一个简单的JS时钟示例作为演示。
各位如果觉得有什么不妥的地方欢迎指出。
代码
(function JSClock(){
//partial class JSClock {
var _timeID = null;
var _timeRunning = false;
var _info;
var _this;
//构造函数
function JSClock(elementId) {
_this = this;
_info = document.getElementById(elementId);
}
JSClock.PRototype.getDateTime = function(){};//因为具体显示需求不同所以没实现
JSClock.prototype.run = function() {
var now = {};
var tick = new Date();
now.hours = tick.getHours();
now.minutes = tick.getMinutes();
now.seconds = tick.getSeconds();
now.day = tick.getDay();
now.month = tick.getMonth()+1;
now.date = tick.getDate();
now.year = tick.getYear();
if (now.year < 1000) now.year += 1900;
_timeRunning = true;
_info.innerHTML = _this.getDateTime(now);
_timeID = setTimeout(arguments.callee,1000);
};
JSClock.prototype.stop = function(){
if(!_timeRunning)return
clearTimeout(_timeID);
_timeRunning = false;
};
//}
window.JSClock = JSClock;
})();
//partial class JSClock{
//virtual
JSClock.prototype.getDateTime = function(now){
var current,weekday;
current = now.year + "年" + now.month + "月" + now.date + "日 " + ((now.hours >12) ? now.hours -12 :now.hours);
current += ((now.minutes < 10) ? ":0" : ":") + now.minutes;
current += ((now.seconds < 10) ? ":0" : ":") + now.seconds;
current += (now.hours >= 12) ? " (下午)" : " (上午)";
if(now.day==0) weekday = " 星期日";
if(now.day==1) weekday = " 星期一";
if(now.day==2) weekday = " 星期二";
if(now.day==3) weekday = " 星期三";
if(now.day==4) weekday = " 星期四";
if(now.day==5) weekday = " 星期五";
if(now.day==6) weekday = " 星期六";
current += weekday;
return current;
};
//}
//测试
var time = new JSClock("test");
time.run();
//运行结果会在ID为test的元素中实时显示当前时间格式如：
//2010年2月6日 0:13:53 (上午) 星期六
