JavaScript实现实时更新系统时间的实例代码

一、js代码

 function gettime(){ 
    str = "当前系统时间：" 
    var p = document.getelementbyid("sy_time"); 
    time = new date(); 
    year = time.getfullyear(); 
    month = time.getmonth() + 1; 
    day = time.getdate(); 
    hour = time.gethours(); 
    minutes = time.getminutes(); 
    seconds = time.getseconds(); 
    str = str + year +"-"+ month +"-"+ day + " " +hour+":"+minutes+":"+seconds; 
    p.innertext = str; 
    settimeout(gettime,1000); 
  } 
  window.onload = function(){ 
    gettime(); 
  } 

二、前端代码

<!-- 页面调用代码 -->
<p id = "sy_time"></p>

以上所述是小编给大家介绍的javascript实现实时更新系统时间的实例代码，希望对大家有所帮助