Javascript tutorial_Javascript tutorial from entry to mastery-Downcodes

English

中文(简体) 中文(繁体) 한국어 日本語 English Português Español Русский العربية Indonesia Deutsch Français ภาษาไทย

Home>Web design tutorial> Javascript tutorial

All Dreamweaver tutorial Javascript tutorial HTML tutorial CSS tutorial Experience and skills DHTML tutorial Web effects WEB standardization

Javascript tutorial

js exit or refresh page detection (and compatible with FF, IE, Chrome)

Copy the code code as follows: <!DOCTYPE html><html><head><script>function closeIt(){return "Any string value here forces a dialog box to /n"

2025-01-26
Native JS operates the web page to add onclick events to the p element and change the color of the table every other row.

1. Add onclick event to all p elements in the web page: copy the code as follows: <%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><html><head>

2025-01-26
100 Practical JS Custom Functions You Can’t Miss

1. Native JavaScript implements string length interception and copy code as follows: function cutstr(str, len) {var temp;var icount = 0;var patrn = /[^/x00-/xff]/;var strre

2025-01-25
Event altKey,ctrlKey,shiftKey attribute analysis

event.altKey Function: Detect whether the Alt key is pressed when the event occurs. Syntax: event.altKey Value: true | false Description: The altKey attribute is true to indicate that the Alt key was pressed and held when the event occurred, and false to

2025-01-25
Two ways to determine whether the URL is valid in js

Method 1: (only applicable to ie) Copy the code as follows: function CheckStatus(url){XMLHTTP = new ActiveXObject("Microsoft.XMLHTTP")XMLHTTP.open("HEAD",url,f

2025-01-25
Summary of undefined learning in JavaScript

This is the value returned when an undeclared variable is used, a variable that has been declared but not assigned a value is used, or an object property that does not exist is used. Although undefined and null are not the same, the == operator treats the

2025-01-25
Introduction to the meanings of top, parent, and opener of JS window objects

1.top This change always refers to the browser window at the highest level of the split window. If you plan to execute commands from the highest level of the split window, you can use the top variable. 2.openeropener is used to reference the object of the

2025-01-25
A simple example of js reading the number of clicks (reading from the database)

It is to get the total number of clicks every time it is clicked, right? 1. You can drag a hidden button control on the server side, and then write the Click event of the button. The function of this event is to retrieve the total number of clicks from th

2025-01-25
A brief analysis of the pitfalls of JavaScript prototypal inheritance

JavaScript uses prototypal inheritance by default. Although there is no concept of a class, its function can act as a constructor. The constructor combined with this and new can build a Java-like class. Therefore, JavaScript can simulate classes by extend

2025-01-25
Implementation code of js running algorithm

Copy it first and see the running effect. The essence used is the setInterval() method: Copy the code and the code is as follows:

2025-01-25
JavaScript string replacement and string splitting sample code

JS (JavaScript) string replacement function (a bit like PHP's preg_replace) str.replace('xxx', 'yyyy'); replace the first str.replace(/xxx/g, 'yyyy'); replace all strings Split (similar to P

2025-01-25
JS small function (setInterval to achieve picture effect display time) example code

Effect: Code: Copy the code. The code is as follows: <head runat="server"><title></title><script type="text/javascript">function toDou(n) {if (n < 10) {return

2025-01-25
js countdown jump example after a few seconds

Copy the code code as follows:<html><head><title> Something went wrong~~~</title>

2025-01-25
js numerical value converted to 3-digit comma separated sample code

Example code: Copy the code as follows: function formatNum(strNum) {if (strNum.length <= 3) {return strNum;}if (!/^(/+|-)?(/d+)(/./d+) ?$/.test(str

2025-01-25
Introduction to the use of anonymous functions in js

1. Overview of anonymous functions The first time I got to know anonymous functions was in the jquery source code. When I opened jQuery, the first thing I saw was the copied code: (function(window, undefined) {........... ............})(wind

2025-01-25

Prev 2 3 4 567 8 9 10Next