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How to simulate a clock using javascript

Source: Internet
Author: User
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How to simulate a clock using javascript

This example describes how to use javascript to simulate a clock. Share it with you for your reference. The specific implementation method is as follows:

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<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>

<Title> javascript analog clock </title>

<! -- Javascript sample code explanation:

In this example, getFullYear of the Javascript built-in object Date is used,

The getMonth and getDate methods. First declare a variable d, var d = new Date (),

The date value of the current day is assigned to the variable d. Then, use getFullYear to get the year value,

Use getMonth to get the month value (Note: The returned value range of getMonth is 0 to 11,

So to get the actual month, add 1 ),

Use getDate to get the date value of the month of the current day.

In this example, "test? Statement 1: Statement 2 ",

If the test condition is met, execute Statement 1,

Otherwise, use Statement 2. This syntax is used for monthly and daily computing,

If the value of month and day is less than 10, add 0 before the value of month and day. = -->

<Script type = "text/javascript">

Function Format2Len (I ){

// If (I <10 ){

// Return "0" + I;

//}

// Else {

// Return I;

//}

Return I <10? "0" + I: I;

}

Function RefreshClock (){

Var CurrentTime = new Date ();

Var timeStr = CurrentTime. getFullYear () + "-" +

Format2Len (CurrentTime. getMonth () + 1) + "-" +

Format2Len (CurrentTime. getDate () + "" +

Format2Len (CurrentTime. getHours () + ":" +

Format2Len (CurrentTime. getMinutes () + ":" +

Format2Len (CurrentTime. getSeconds ());

TxtClock. value = timeStr;

}

SetInterval ("RefreshClock ()", 1000 );

</Script>

</Head>

<Body onload = "RefreshClock ()">

<! -- Execute once when loading the page -->

Current Time: <input type = "text" id = "txtClock"/>

</Body>

</Html>

I hope this article will help you design javascript programs.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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