您可以签出以下代码：

var today = new Date();

var Christmas = new Date("2012-12-25");

var diffMs = (Christmas - today); // milliseconds between now & Christmas

var diffDays = Math.floor(diffMs / 86400000); // days

var diffHrs = Math.floor((diffMs % 86400000) / 3600000); // hours

var diffMins = Math.round(((diffMs % 86400000) % 3600000) / 60000); // minutes

alert(diffDays + " days, " + diffHrs + " hours, " + diffMins + " minutes until Christmas 2009 =)");

或var diffMins = Math.floor((...舍弃秒，如果您不想舍入分钟。