基于jQuery的倒计时插件代码

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);