JavaScript

The requirement is that there are multiple groups (not fixed) on the same page, and the number of blocks in each group is not necessarily the same. only one block needs to be expanded at a time. the implementation principle is actually very simple.

First, let's look at the concept. First, DOM is a tree, and its root node is Document, which can be roughly used to represent:The so-called "Recent co-ancestor element" refers to the element that gives a series of elements to find out the largest

The each () function is a tool-class function provided by almost all frameworks. Through it, You can traverse and process the attribute values of objects and arrays. This method is implemented by jQuery and jQuery objects. For jQuery objects, the

1. Avoid using eval or Function Constructor2. Avoid using3. Do not use try-catch-finally in functions with performance requirements.4. Avoid using global variables5. Avoid using for-in functions with performance requirements.6. Use string to

Usage: add the code to the template, or put it in the advertisement code for calling like me. Change the path of the swf file and mp3 file. To enable automatic start and loop playback, add code & autostart = 1 & autoreplay = 1, for example, "mp3 =

1. js Regular Expression (RegExp object)The RegExp object has three methods: test (), exec (), and compile ().① Test () method// The test () method retrieves the specified value in the string. The return value is true or false.Var patt1 = new RegExp

The client is the UTF-8 code, which is now recognized as the standard codeIn this case, when AJAX is used to asynchronously obtain the server information of GB2312 encoding, Chinese Character garbled characters are inevitable.Because the target data

Problem: the original form verification is invalid when the hide () method and setvisible (false) method are used to remove the form from the items Center (a tail form has been removed in many examples ).Solution: remove a form using the remove (id)

Definition and usageThe charset attribute specifies the character encoding used in an external script file.If the character encoding in an external file is different from that in the main file, the charset attribute is used.The default character

: Nth-child (index/even/odd/equation) matches the nth child or parity element ': eq (index)' under the parent element to only match one element, this will match the child element for each parent element. : Nth-child starts from 1, while: eq () is

First: JSON mode/direct object volumeFormat:Var object name = {Variable 1: The value of variable 1,Variable 1: The value of variable 1,......,Function 1: function (){Function body},Function 2: function (){Function body} // Note: The last comma must

Copy codeThe Code is as follows:/* Based on Alex Arnell's inheritance implementation .*/Var Class = (function (){// Temporarily store the prototype of the parentFunction subclass (){};// Create a classFunction create (){Var parent = null, properties

$$$$ F$ H$ R$ WTry. theseDocument. getElementsByClassName$ Method -- become a Swiss Army knife (Swiss Army knife)If provided with a string, returns the element in the document with matching ID; otherwise returns the passed element. takes in an

Object is used by Prototype as a namespace; that is, it just keeps a few new methods together, which are intended for namespaced access (I. e. starting with "Object .").The namespace mentioned above is equivalent to the static class in C #. It

Method 1:Use a browser internal converter to implement conversion. The essentials are to dynamically create a container label element, such as DIV, and set the string to be converted to the innerText of this element (ie supported) | textContent

However, the TabPanel in ExtJS can only be displayed horizontally. After searching for the Ext forum, we found that the vertical TabLayout extension exists, but the tab content of the vertical tab is displayed horizontally, after the tab is added,

A simple function is to use JQuery to display preset keywords when users enter search characters in the search bar. In addition to surprising users, it also simplifies the input. For example: The implementation method is very simple. First, you

However, if you want to add more styles for the website to allow visitors to choose from, or if you want to adjust the style of the website and let the visitor reflect it before making a decision, this is also a good way to save the trouble of

Main functions:1. Automatic Detection of the number of AD images to produce ad Sequences2. Slow switching, similar to the original FLASH effect3. automatic playback Based on the set period4. Move the mouse to stop automatic playback. Move the mouse

At least every programmer who tries to use JavaScriptOO spends a lot of energy on the simulation of object-oriented mechanisms rather than the business itself.This is hard to imagine for Java, C ++, and even Php developers.What's worse is that