setInterval() 方法可按照指定的周期(以毫秒计)来调用函数或计算表达式
1 <script type="text/javascript"> 2 setInterval(function(){ 3 var myDate = new Date(); 4 var $_year = myDate.getFullYear(); 5 var $_month = parseInt(myDate.getMonth())+1; 6 var $_day = myDate.getDate(); 7 8 var $_hour = myDate.getHours(); 9 var $_minute = myDate.getMinutes(); 10 var $_second = myDate.getSeconds(); 11 12 if ($_hour < 10) { 13 $_hour = "0" + $_hour; 14 } 15 if ($_minute < 10) { 16 $_minute = "0" + $_minute; 17 } 18 if ($_second < 10) { 19 $_second = "0" + $_second; 20 } 21 22 var $_f_date2 = $_year +"年"+$_month+"月"+$_day+"日"+" "+$_hour+":"+$_minute+":"+$_second; 23 time.innerHTML = $_f_date2; 24 },1000) //每过1秒运行一次 25 </script>