本文实例讲述了jQuery基于扩展简单实现倒计时功能的方法。分享给大家供大家参考，具体如下：

jQuery.fn.countDown = function(settings,to) { settings = jQuery.extend({ startFontSize: '36px', endFontSize: '12px', duration: 1000, startNumber: 10, endNumber: 0, callBack: function() { } }, settings); return this.each(function() { //where do we start? if(!to && to != settings.endNumber) { to = settings.startNumber; } //set the countdown to the starting number $(this).text(to).css('fontSize',settings.startFontSize); //loopage $(this).animate({ 'fontSize': settings.endFontSize },settings.duration,'',function() { if(to > settings.endNumber + 1) { $(this).css('fontSize',settings.startFontSize).text(to - 1). countDown(settings,to - 1); } else { settings.callBack(this); } }); }); }; /* sample usage //调用方法 // $('#countdown').countDown({ startNumber: 10, callBack: function(me) { $(me).text('倒计时加载完毕').css('color','#090'); } });

希望本文所述对大家jQuery程序设计有所帮助。