How to set picture time in javascript

Javascript method to set picture time: get the current time and convert it to a string, loop to get the string and change the node picture path, the code is [var sr = toDou(time.getHours()) toDou(time .getMinutes()) toDou】.

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, DELL G3 computer.

Javascript method of setting picture time:

<script type="text/javascript">
  function toDou(n){//将十以内的数字转换成两位
         if(n<10){
            return &#39;0&#39;+n;
         }else{
             return &#39;&#39;+n;
      }
  }

Get the current time and convert it to a string, loop to obtain the string and change the node picture path

    function tick(){
        var time = new Date();
        var sr = toDou(time.getHours())+toDou(time.getMinutes())+toDou(time.getSeconds());
        var img = document.getElementsByTagName('img');
        for(var i = 0;i<img.length;i++){
            img[i].src = &#39;img/&#39;+sr[i]+&#39;.png&#39;;
        }
    }
    window.οnlοad=function(){
    tick();
    setInterval(tick, 1000);
    }
<script>

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