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Dynamically display the current system time based on javascript_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:17:191892browse

The example in this article explains the detailed code of javascript to dynamically display the current system time. The specific content is as follows

  • (1) Time and date information should be displayed in a dc6dce4a544fdca2df29d5ac0ea9906b
  • (2) Timer: Access the system time again every second, setTimeout() of the window object
  • (3) Timing of clock display (event): It is displayed after the web page is loaded, event onload
  • (4) How to write time and date information into the specified dc6dce4a544fdca2df29d5ac0ea9906b, the innerHTML attribute in the DOM object

Rendering:

Specific code: 

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript">


//定义函数：构建要显示的时间日期字符串
function showTime()
{
 //创建Date对象
 var today = new Date();
 //分别取出年、月、日、时、分、秒
 var year = today.getFullYear();
 var month = today.getMonth()+1;
 var day = today.getDate();
 var hours = today.getHours();
 var minutes = today.getMinutes();
 var seconds = today.getSeconds();
 //如果是单个数，则前面补0
 month  = month<10  &#63; "0"+month : month;
 day  = day <10  &#63; "0"+day : day;
 hours  = hours<10  &#63; "0"+hours : hours;
 minutes = minutes<10 &#63; "0"+minutes : minutes;
 seconds = seconds<10 &#63; "0"+seconds : seconds;
 
 //构建要输出的字符串
 var str = year+"年"+month+"月"+day+"日 "+hours+":"+minutes+":"+seconds;
 
 //获取id=result的对象
 var obj = document.getElementById("result");
 //将str的内容写入到id=result的<div>中去
 obj.innerHTML = str;
 //延时器
 window.setTimeout("showTime()",1000);
}
</script>
<style type="text/css">
#result{
 width:500px;
 border:1px solid #CCCCCC;
 background:#FFFFCC;
 margin:50px auto;
 font-size:24px;
 color:#FF0000;
 padding:20px;
}
</style>
</head>

<body onload="showTime()">
<div id="result"></div>
</body>
</html>

I hope this article will be helpful to everyone’s JavaScript programming design.

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