Olympic countdown clock effect code implemented in js_javascript skills-JS Tutorial-php.cn

Home

Web Front-end

JS Tutorial

Olympic countdown clock effect code implemented in js_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 03:26 PM

jsCountdownclock

The example in this article describes the Olympic countdown clock effect code implemented in js. Share it with everyone for your reference, the details are as follows:

The screenshot of the running effect is as follows:

The specific code is as follows:

<html> 
<head> 
 <title>js倒计时</title> 
 <SCRIPT language=JavaScript1.2> 
function setcountdown(theyear,themonth,theday){ 
yr=theyear;mo=themonth;da=theday 
} 
setcountdown(2016,8,5) 
var occasion="2016巴西奥运会" 
var message_on_occasion="盼望已久的时刻终于来到了!" 
var countdownwidth='480px' 
var countdownheight='20px' 
var countdownbgcolor='tan' 
var opentags='<font face="宋体"><small>' 
var closetags='</small></font>' 
var montharray=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec") 
var crosscount='' 
function start_countdown(){ 
if (document.layers) 
document.countdownnsmain.visibility="show" 
else if (document.all||document.getElementById) 
crosscount=document.getElementById&&!document.all&#63;document.getElementById("countdownie") : countdownie 
countdown() 
} 
if (document.all||document.getElementById) 
document.write('<span id="countdownie" style="width:'+countdownwidth+'; background-color:'+countdownbgcolor+'"></span>') 
window.onload=start_countdown 
function countdown(){ 
var today=new Date() 
var todayy=today.getYear() 
if (todayy < 1000) 
todayy+=1900 
var todaym=today.getMonth() 
var todayd=today.getDate() 
var todayh=today.getHours() 
var todaymin=today.getMinutes() 
var todaysec=today.getSeconds() 
var todaystring=montharray[todaym]+" "+todayd+", "+todayy+" "+todayh+":"+todaymin+":"+todaysec 
futurestring=montharray[mo-1]+" "+da+", "+yr 
dd=Date.parse(futurestring)-Date.parse(todaystring) 
dday=Math.floor(dd/(60*60*1000*24)*1) 
dhour=Math.floor((dd%(60*60*1000*24))/(60*60*1000)*1) 
dmin=Math.floor(((dd%(60*60*1000*24))%(60*60*1000))/(60*1000)*1) 
dsec=Math.floor((((dd%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1) 
if(dday<=0&&dhour<=0&&dmin<=0&&dsec<=1&&todayd==da){ 
if (document.layers){ 
document.countdownnsmain.document.countdownnssub.document.write(opentags+message_on_occasion+closetags) 
document.countdownnsmain.document.countdownnssub.document.close() 
} 
else if (document.all||document.getElementById) 
crosscount.innerHTML=opentags+message_on_occasion+closetags 
return 
} 
else if (dday<=-1){ 
if (document.layers){ 
document.countdownnsmain.document.countdownnssub.document.write(opentags+"时间已经过了!"+closetags) 
document.countdownnsmain.document.countdownnssub.document.close() 
} 
else if (document.all||document.getElementById) 
crosscount.innerHTML=opentags+"Occasion already passed! "+closetags 
return 
} 
else{ 
if (document.layers){ 
document.countdownnsmain.document.countdownnssub.document.write(opentags+dday+ " days, "+dhour+" hours, "+dmin+" minutes, and "+dsec+" seconds left until "+occasion+closetags) 
document.countdownnsmain.document.countdownnssub.document.close() 
} 
else if (document.all||document.getElementById) 
crosscount.innerHTML=opentags+"还有 "+dday+ " 天, "+dhour+" 小时, "+dmin+" 分, "+dsec+" 秒 就是 "+occasion+closetags 
} 
setTimeout("countdown()",1000) 
} 
</SCRIPT> 
<SCRIPT type="text/javascript" src=""></SCRIPT> 
<SCRIPT language="JavaScript"> 
<!--  
BaiduWriteAD("zouwenyedg","3"); 
//-->  
</SCRIPT> 
</head> 
<body> 
<ILAYER id=countdownnsmain visibility="hide" bgColor="&{countdownbgcolor};"  
height="&{countdownheight};" width="&{countdownwidth};"><LAYER  
id=countdownnssub height="&{countdownheight};"  
width="&{countdownwidth};" top="0" left="0"></LAYER></ILAYER> 
</body> 
</html>

I hope this article will be helpful to everyone in JavaScript programming.

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Understanding the JavaScript Engine: Implementation DetailsApr 17, 2025 am 12:05 AM

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AM

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

From C/C to JavaScript: How It All WorksApr 14, 2025 am 12:05 AM

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

JavaScript Engines: Comparing ImplementationsApr 13, 2025 am 12:05 AM

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

Beyond the Browser: JavaScript in the Real WorldApr 12, 2025 am 12:06 AM

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AM

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)Apr 11, 2025 am 08:22 AM

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

See all articles