JavaScript

In Javascript, everything is an object. strings are objects, arrays are objects, variables are objects, and functions are objects. Therefore, ['A', 'B ', 'C']. push ('D'); such an operation exists. The class itself is also an object. You can also

The following describes how to handle and debug JS errors.Method 1: Use the alert () and document. write () methods to monitor variable values.When the variable value is displayed in the pop-up dialog box, alert () stops running the code until the

Based on the previous experienceCopy codeThe Code is as follows: contentType: "application/x-www-form-urlencoded; charset = UTF-8 ",Added to the parameters of the ajax request, the result does not work this time.After observing the result of Fiddler

Sometimes you need to implement the value auto-increment or auto-increment function for the text box when designing the form. For example, the default value is 1. Click the up button to add the specified step value, click the down Button to reduce

1. first, let's take a look at several concepts, such as "Events", "event streams", "event names", and "event processing functions/event listening functions ", you can know your friends.Events: events are specific actions performed by users or

Copy codeThe Code is as follows:// Use prototype inheritance, and use a temporary object as the Child prototype property in the middle. The prototype property of the temporary object then points to the prototype of the parent class,// Prevent all

Check Discuz! When the source code is found, a piece of browser verification code is still classic:Copy codeThe Code is as follows:Var BROWSER = {};Var USERAGENT = navigator. userAgent. toLowerCase ();Alert (USERAGENT );BROWSER. ie = window.

JavaScript overload functions are generally operated by arguments.For example:Copy codeThe Code is as follows:Var afunc = function (){Args = arguments;If (args. length = 1 ){Console. log (1 );} Else if (args. length = 2 ){Console. log (2 );} Else if

The reason is that the third-party cookie security authentication is strict in these browsers. You must confirm that the user takes the initiative to access the Third-Party website to read the cookie, therefore, you need to click a boot page to

Note: IE6 and earlier versions support the min/max-width/height attribute in CSS.Copy codeThe Code is as follows:@ If (@ _ win32 & @ _ jscript_version> 4)Var minmax_elements;Minmax_props = new Array (New Array ('min-width', 'minwidth '),New Array

Document methods:Cyclic execution: var timeid = window. setInterval ("method name or method", "latency"); window. clearInterval (timeid );Scheduled execution: var tmid = window. setTimeout ("method name or method", "latency"); window. clearTimeout

The following code may be helpful to you:Copy codeThe Code is as follows:// 1. Obtain the selected option value$ ('# SelectList'). val ();// 2. Obtain the text of the selected option$ ('# SelectList: selected'). text ();// 3. Obtain multiple

Post a code first:Function O (user, pwd) {// use constructorThis. user = user;This. pwd = pwd;This. get = get;Return this;}Function O2 (user, pwd) {// use factoryVar obj = new Object ();Obj. user = user;Obj. pwd = pwd;Obj. get = get;Return

This is a registration form, requiring users to select "Professional staff" and "qualitative staff, display the corresponding forms of "visitors are available" and "industries that are easy to access" respectively. When the two boxes are unselected,

1. var myObject = {};2. function myObject (){....}3. var myObject = function (){};For the last two methods, we can also add parameters, which is similar to a constructor with parameters.For example:Function myObject (msg){Alert (msg );}Var newObject

Grid example in Ext Href = "../AllRes/resources/css/ext-all.css"/>

Copy codeThe Code is as follows:String. prototype. replaceAll = function (s1, s2 ){Return this. replace (new RegExp (s1, "gm"), s2 );};(Function ($ ){/** $-Layer 0.1-New Wave Javascript** Copyright (c) 2008 King Wong* $ Date: 2008-10-09 $*/Var ___

I. UTF8 encoding Functions Copy codeThe Code is as follows:Function URLEncode (Str ){If (Str = null | Str = "")Return "";Var newStr = "";Function toCase (sStr ){Return sStr. toString (16). toUpperCase ();}For (var I = 0, icode, len = Str. length; I

First, you need a container to set its overflow to hidden and position to relative;The container also needs a slide object and sets its position to absolute;Initialize some attributes in the initialize () function.Before switching, run the Start ()

This function is very important and will become the core method of jQuery in the future. It completely changes how to use ajax in jQuery. All ajax code of jQuery has been rewritten to implement it. However, it is abstract, difficult for beginners to