function startTime(){var today = new Date();var year = today.getFullYear();var month = today.getMonth() + 1;var day = today.getDate();var weekday = today.getDay();var h=today.getHours()var m=today.getMinutes()var s=today.getSeconds()// add a zero in front of numbers<10m=checkTime(m)s=checkTime(s)document.getElementById('txt').innerHTML=year + "年" + month + "月" + day + "日"+ h +":" + m + ":" + st=setTimeout('startTime()',500)}function checkTime(i){if (i<10)   {i="0" + i}  return i}