javascript系统时间设置操作示例

<script>  //myTime typeof //object  window.onload = function() {    var obody = document.body;    //设置一个定时器，每过一秒钟，自动加一秒    setInterval(fnTime, 1000)    //如果不执行这个函数，第一次打开时，会过一秒钟才出来    fnTime();    function fnTime() {      var myTime = new Date();      var iYear = myTime.getFullYear();      var iMonth = myTime.getMonth() + 1;      var iDate = myTime.getDate();      var iWeek = myTime.getDay();      var iHours = myTime.getHours();      var iMinutes = myTime.getMinutes();      var iSeconds = myTime.getSeconds();      var str = "";      if(iWeek === 0) iWeek = "星期日"      if(iWeek === 1) iWeek = "星期一"      if(iWeek === 2) iWeek = "星期二"      if(iWeek === 3) iWeek = "星期三"      if(iWeek === 4) iWeek = "星期四"      if(iWeek === 5) iWeek = "星期五"      if(iWeek === 6) iWeek = "星期六"      str = iYear + "年" + iMonth + "月" + iDate + "日 " + iWeek + " " + toTwo(iHours) + "时" + toTwo(iMinutes) + "分" + toTwo(iSeconds) + "秒"      obody.innerHTML = str;    }    console.log(toTwo(05))//05    console.log(toTwo(15))//15    //这个函数主要是让:时分秒到59秒时，再走一秒就变成了0，而不是00，所以要转换一下    function toTwo(n) {      /*       if(n < 10) {       return "0" + n;       } else {       return "" + n;       }       */      //我们可以用三目      return n < 10 ? "0" + n : "" + n    }  }</script>