JS 计算时间差，（引入外部字体文件）

@font-face{
font-family: "Digital-7 Mono";
src: url('Digital-7Mono.TTF');
}
div{
width: 500px;
}
.contain{
text-align: right;
font-size: 18px;
margin-top: 10px;
margin-bottom: 10px;
}
.contain span{
font-family: "Digital-7 Mono";
font-size: 36px;
color: #555;
padding-left: 10px;
}

<div class="contain"></div>

<script src="jquery.min.js"></script>
<script type="text/javascript">
var displayMode = 1;
var time; $(".contain").click(function(){
displayMode *= -1;
Time(time, displayMode);
}); // 返回不同月份不同天数的方法
function getDaysInMonth(month) {
var data = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
return data[month];
} // 设置开始时间
function start(year,month,day,hour,min,sec,mill){
var starttime =new Date();
starttime.setFullYear(year,month-1,day);
starttime.setHours(hour,min,sec,mill);
time =starttime;
return time;
}
start(2015,2,20,21,0,0,0); function Time(date,mode){
var years = NaN;
var months = NaN; var current =new Date();
var seconds =(Date.parse(current) - Date.parse(date)) /1000; //获取时间差的秒数
var days =Math.floor(seconds / (3600 * 24)); //总天数 seconds = seconds % (3600 * 24); //总秒数 % 一天的秒数 下面的同理
var hours =Math.floor(seconds / 3600); seconds = seconds % 3600;
var minutes = Math.floor(seconds / 60); seconds = seconds % 60; // 判断假如时分秒小时10的话 前面加0
(seconds <10)? seconds ="0"+seconds:seconds=seconds;
(hours <10)? hours ="0"+hours:hours=hours;
(minutes <10)? minutes ="0"+minutes:minutes=minutes; if (mode == 1) {
days = current.getDate() - date.getDate(); //当前日 - 开始日
if (days < 0) {
days += getDaysInMonth(current.getMonth());
current.setDate(current.getDate() -1);
}
months = current.getMonth() - date.getMonth();
if (months < 0) {
months += 12;
current.setFullYear(current.getFullYear() - 1);
}
years = current.getFullYear() - date.getFullYear();
} else {
days = Math.floor((current.getTime() - date.getTime()) / (1000 * 3600 * 24));
} var result = (years > 0 ? "<span class='years'>" + years + "</span> year ":"")
result += (months >= 0 ? "<span class='months'>" + months + "</span> month ":"");
result += "<span class='days'>" + days + "</span> day ";
result += "<span class='hours'>" + hours + "</span> hr "
result += "<span class='minutes'>" + minutes + "</span> min "
result += "<span class='seconds'>" + seconds + "</span> sec" $(".contain").html(result);
}
Time(time,displayMode); setInterval(function(){
Time(time,displayMode);
},1000)
</script>