做一个jQuery计数计时器

// Creating the plugin$.fn.countup = function(prop){ var options = $.extend({ callback : function(){}, start : new Date() // Changing this to "start" },prop); // Tename the "left" variable to "passed" var passed = 0, d, h, m, s, positions; init(this, options); positions = this.find('.position'); (function tick(){ // Calculate the passed time passed = Math.floor((new Date() - options.start) / 1000); // Calculate the passed minutes, hours and days d = Math.floor(passed / days); updateDuo(0, 1, d); passed -= d*days; h = Math.floor(passed / hours); updateDuo(2, 3, h); passed -= h*hours; m = Math.floor(passed / minutes); updateDuo(4, 5, m); passed -= m*minutes; // Number of seconds passed s = passed; updateDuo(6, 7, s); // Calling an optional user supplied callback options.callback(d, h, m, s); // Scheduling another call of this function in 1s setTimeout(tick, 1000); })(); // This function updates two digit positions at once function updateDuo(minor,major,value){ switchDigit(positions.eq(minor),Math.floor(value/10)%10); switchDigit(positions.eq(major),value%10); } return this;};$('#countdown').countup();$('#countdown').countup({ start: new Date(2012, 10, 27, 15, 58, 21) //year, month, day, hour, min, sec});

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