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Javascript tutorial

JS to add a solution to the page to add style to the page

I encountered a problem when I did a project today. My A.JSP introduced B.JSP, C.JSP also introduced B.JSP, and the style in B.JSP is based on different dynamic changes introduced (in A.JSP , Write JS change in C.JSP). I found a lot of code on the Interne

2025-02-09
Several good ways to define functions by js function

4 ways to define functions by js function 1. The most basic method is used as a function declaration. The code copy is as follows: The code copy is as follows: function func(){} or var func=function(){}; 2. Use as a class constructor:

2025-02-09
Use JavaScript to disable all text boxes, drop-down menus, and multi-line text fields on the web page

The principle is to loop through the controls on the web page, and then set the disabled attribute to true. The code is as follows: Copy the code and the code is as follows: <script type="text/javascript">var nodeList = document.getElementsByTa

2025-02-09
Mobile tablet and other mobile terminals adapt to js of URL JS code

Copy code code as follows: <script type="text/javascript">if(/AppleWebKit.*mobile/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SA

2025-02-09
A brief analysis of the defects of for in in js

The for in statement is used to list the properties (members) of an object. Copy the code as follows: var obj = { name: "jack", getName: function() { return this.name}}; // Output name, getName for ( var

2025-02-08
Document.execcommand () usage summary

The first thing to explain is that it is not well supported under Firefox. 2D-POSITION allows objects that move absolute positioning by dragging movement. AbsOluteposition sets the POSITION attribute of the element as "absolute" (absolutely). Ba

2025-02-08
JS judging whether characters are two ways of Chinese characters

Sometimes it is necessary to determine whether a character is a Chinese character. For example, when the user enters the content containing Chinese and English, you need to judge whether it exceeds the prescribed length. There are usually two methods to j

2025-02-08
Click to show the method to hide other peer elements

The code copy is as follows:

2025-02-08
Javascript implements a small example of returning to the previous page and refreshing it

Today I wrote a small page that prompts success. It also requires returning to the previous page and refreshing the operations on the previous page (such as deletion and addition). I searched it online and found that basically 90% of the results are corre

2025-02-08
js dynamically create upload form to simulate Ajax through iframe to achieve refresh-free

The code copy is as follows:<script> window.onload=function(){ upfile('file.php'); } /* ** url 路径 **/ function upfile(url){ //创建iframe var

2025-02-08
JavaScript to get the method of elemental value in the page in iframe

IE method: document.frames ['myframe']. Document.GetelementByid ('test'). Value; Firefox method: document.GetelementByid ('myframe'). Contentwin

2025-02-08
Function to determine whether the input is Chinese using js

Examples are as follows: Copy the code code as follows: function ischinese(s){var ret=true;for(var i=0;i<s.length;i++)ret=ret && (s.charCodeAt(i)> =10000);return r

2025-02-08
A js-controlled navigation menu example code

This menu effect is controlled through scripts and styles. It is a very good learning content for novices: This small code was used to organize this menu while watching Strictly Come Dancing last night. Let’s take a look at it. Once you learn it, you can

2025-02-08
JS retains two decimals, multiple decimal sample code

Copy code code as follows: <SCRIPT LANGUAGE="JavaScript"><!--function formatFloat(src, pos){return Math.round(src*Math.pow(10, pos))/Math.

2025-02-08
Examples of use of get and set for JS

Use get and set skillfully to directly manipulate object properties to realize reading and writing, which can greatly improve programming efficiency. A typical example is given: The copy code code is as follows: var test = { _Name : null, _Age : 0, //_Nam

2025-02-08

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