基于jQuery的倒计时插件代码

剩余时间：1小时：40分：30秒

1 /* 
* 倒计时插件，主要用来限时购买 
* By wayshan 版本1.0 
* 使用方法： 
* $(function(){ 
* $("#ElementId").countdown({ 
* Edate:"2012-12-21 15:14:23" 
* }); 
* }) */ 
;(function($){ 
$.fn.countdown = function(options){ 
if (this.length == 0){ 
return false; 
} 
return this.each(function(){ 
var Default = { 
Sdate:null,//开始时间（格式为“2010-10-10 10:10:10”）可以设置为服务端的时间 
Edate:null,//结束日期（格式为“2010-10-10 10:10:10”） 
callback:function(){ 
return false; 
} 
}, 
_H_Text='小时', 
_M_Text='分', 
_S_Text='秒', 
_lT = null, 
_cT = new Date(), 
_eT = null, 
_elT = null, 
ctime = null, 
etime = null, 
DomId = null, 
_timeout = null, 
_gt = function(){ 
if (_lT == null) { 
_elT = (etime - ctime); 
if (_elT < 0){ 
$('#'+DomId).html("<strong>0</strong>"+_H_Text+":<strong>0</strong>"+ 
_M_Text+":<strong>0</strong>"+_S_Text); 
} 
var _xT =Math.ceil(_elT/(24*60*60*1000)); 
_cT = parseInt(_cT.match(/\s(\d+)\D/)[1] * 3600) 
+ parseInt(_cT.split(":")[1] * 60)+ parseInt(_cT.split(":")[2]); 
_eT = _xT * 24 * 3600 + parseInt(_eT.match(/\s(\d+)\D/)[1] * 3600) 
+ parseInt(_eT.split(":")[1] * 60) + parseInt(_eT.split(":")[2]); 
_lT = _elT/1000; 
} 
if (_elT > 0) { 
if (_lT >= 0) { 
var _H = Math.floor(_lT / 3600); 
var _M = Math.floor((_lT - _H * 3600) / 60); 
var _S = (_lT - _H * 3600) % 60; 
$('#'+DomId).html("<strong>" + _H + "</strong>"+_H_Text+":<strong>" 
+ _M + "</strong>"+_M_Text+":<strong>" + _S + "</strong>"+_S_Text); 
_lT--; 
} else { 
clearInterval(_timeout); 
if(s.callback && $.isFunction(s.callback)){ 
s.callback.call(this); 
} 
} 
} else { 
clearInterval(_timeout); 
if(s.callback && $.isFunction(s.callback)){ 
s.callback.call(this); 
} 
} 
}, 
strDateTime = function(str){ 
//判断日期时间的输入是否正确，类型必须形如为：2011-01-01 01:01:01 
var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/; 
var r = str.match(reg); 
if(r==null)return false; 
var d= new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]); 
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4] 
&&d.getHours()==r[5]&&d.getMinutes()==r[6]&&d.getSeconds()==r[7]); 
} 
var s = $.extend({}, Default, options || {}); 
DomId = this.id; 
if (DomId == 'null'){ 
return; 
} 
_eT = s.Edate; 
if (!strDateTime(_eT)){ 
alert('结束日期格式不正确'); 
return false; 
} 
if (s.Sdate != null){ 
_cT = s.Sdate; 
} 
_cT = _cT.toString(); 
cdate = _cT.replace(/-/g, '/'); 
_eT = _eT.toString(); 
edate = _eT.replace(/-/g, '/'); 
ctime = new Date(cdate); 
etime = new Date(edate); 
_timeout = setInterval(_gt, 1000) 
}); 
} 
})(jQuery);