JavaScript

- - - - -

This is mainly used in form fields, so my experiment here is only for form fields. In the child element of form, search for the first field that is not a hidden field cyclically, and then use the focus method to obtain the focus. (Haha ^ _ ^, very

CopyCodeThe Code is as follows: function gethttprequest () { VaR xhr = false; If (window. XMLHttpRequest) Xhr = new XMLHttpRequest (); // browsers except IE Else if (window. activexobject) { Try { Xhr = new activexobject ("msxm12.xmlhttp");

remaining words in the JS computing text field note: displaysparenumber (this, 10) and 10 indicates the content length you have defined. [Ctrl + A select all Note: If you need to introduce external JS, You need to refresh it to

Speak nonsense, Code Come up: Copy code The Code is as follows: Document. onkeydown = function () { VaR eventutil = {}; Eventutil. getevent = function (){ If (window. Event) {return window. event ;} Else {return eventutil. getevent. Caller.

1. ArgumentsAn array corresponding to the arguments passed to a function. In a function, the identifier arguments references a special attribute of the arguments object. You can obtain the parameter values passed to the function by number (rather

// Binary search for the forgetful recursive version CopyCode The Code is as follows: function binary_search (ARR, target, low, high ){ If (low VaR min = (low + high)/2; If (target> arr [Min]) Return binary_search (ARR, target, min + 1, high

Copy codeThe Code is as follows: var example = new Fx (element, // element { Form :{ // The style before the animation // Color: "# 00f ", }, To :{ // Target Style Color: "# 00f ", "Background-color": "#5f5 ", Opacity: 0.9, }, // Linear

[Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]

hexadecimal conversion 10 hexadecimal hexadecimal hexadecimal 10-digit encoding and conversion Number character character numbers available in HTML &# 22221; indicates encoding character encoding table name range quantity

Each object has a hidden object attribute that is used to point to its parent object (a function for constructing the object). This is called a parent object or an implicit object ), and inherit from its attributes and methods [function object has

Core code: Copy codeThe Code is as follows :/** * Jscript. string package * This package contains utility functions for working with strings. */ If (typeof jscript = 'undefined '){ Jscript = function (){} } Jscript. string = function (){} /** * This

Differences between textContent and innerText IE has an innerText attribute, and FF has a textContent attribute. Many of the scripts previously written to IE cannot find the innerText attribute under FF. Therefore, we recommend that you use

About 70% of the content below is from http://www.quirksmode.org/js/this.html, and another 30th is my thoughts on this article. Hope to help people in need... First, let's look at a typical question about the this keyword:Copy codeThe Code is as

Usage: 1. Set cookie Copy codeThe Code is as follows: var cookie = new JSCookie (); // Normal settings Cookie. SetCookie ("key1", "val1 "); // The expiration time is one year. Var expire_time = new Date (); Expire_time.setFullYear

Copy codeThe Code is as follows :/* * Function name: DateUtil * OPERATOR: yithcn * Function Description: Date Functions * Instructions: * Creation date: 2010.10.14 */ Var DateUtil = {}; DateUtil. base = 60*60*24*1000; DateUtil. Add = function (num,

The Code is as follows: Copy codeThe Code is as follows: function write (msg ){ For (var I = 0; I Document. write (arguments [I] + ' '); } } // About '&&' Test1 = 1 & 2 & 3 & 4; Test2 = '0' & 2 & 3 & 4; Test3 = 1 & 2 & 0 & 4; Test4 = 2 & 'I' & 'love'

For example: Copy codeThe Code is as follows: // code 1 Function Pig (){} Var pig = new Pig (); Alert (pig instanceof Pig); // => true Function FlyPig (){}FlyPig. prototype = new Pig ();Var flyPig = new FlyPig ();Alert (flyPig instanceof Pig); // =>

Demo address: http://demo.jb51.net/js/mouse/index.html Packaging http://www.jb51.net/jiaoben/32434.html This was written when I was bored. First, let's look at the effect (the UI is ugly ): Note: The red button points 100 and the blue button points

This article will answer the last question about pseudo arrays mentioned in the general circular Traversal method forEach in javascript. What is a pseudo array? You can use Array. prototype. slice to convert an object with the length attribute to a