JavaScript

= Equality, === identity. =, When the value types on both sides are different, type conversion should be performed first and then comparison should be made.=, No type conversion is required. The types may vary. The descriptions are as follows:=,

// Constructor new date (milliseconds) // new date (year, month, day, hours, minutes, seconds, MS) // PS: month parameter range: 0-11 // key point: the date object is converted to a string in the specified format, and the string is converted to a

Frequent Dom operations are very performance-consuming. However, in rich web applications, we have to write scripts to deal with Dom. How can we optimize this performance bottleneck, consider the following three situations: Access and modify DOM

About the optimization of Dom operation performance in the browser, in the previous blog article titled Optimization of Dom operation performance in the browser (I) the impact of accessing and modifying DOM elements on performance and the

Reprinted from:Http://www.mangguo.org/javascript-prototype-inheritance-basic-mechanisms/     Due to language design, JavaScript does not have the concept of "class" in the true sense. The new command is usually used to instantiate an object. The

Extract URL parameters using JavaScript function getArgs() { var args = new Object(); var query = location.search.substring(1); var pairs = query.split('&'); for (var i = 0; i var pos = pairs[i].indexOf('='); if (pos == -1)

Javascript cookie is a convenient persistent data storage solution suitable for clients. Cookie is a list of name-value pairs separated by semicolons. The following describes three reusable cookie methods: Function writecookie (name, value, days ){//

1. "methods" are just functions that are assigned to a property of an object.Example: VaR slideshow = function () {init: function () {This. start () ;}, start: function () {},}; window. onload = slideshow. init; // call this. in start (), this is

Client scripts make the application more attractive, but the execution of the browser's interpretation of the script code may also lead to low efficiency. Here we will discuss several best practices and suggestions for optimizing JavaScript code.   1

Private void maid (Object sender, system. Web. UI. webcontrols. datagriditemeventargs E){If (E. Item. itemtype = listitemtype. Item | E. Item. itemtype = listitemtype. alternatingitem) { String orderitemid = E. Item. cells [0]. Text; // E. Item.

Word Translation list: Function: function (function not translated)Declare: DefinitionAssign: Assign, assignFunctionbody: function body (the content of the function)Object: ObjectProperty: PropertyUnnamed: anonymous (not translated as unnamed

The JS image display effect is very high. A slight change can produce a different image display effect, while the lazy hacker also collects a lot of JS image display effects, which is very dazzling, similar to the sharing of ultra-complete JS tree

In the previous article, the Javascript image display effect that can be automatically played and dragged (1) has already introduced one of the JS image display effects. Do you know whether it meets your needs? If you still feel a little worse, take

1. dynamically create select Function createselect (){ VaR myselect = Document. createelement (select );Myselect. ID = myselect;Document. Body. appendchild (myselect );} 2. Add Option Function addoption (){ Search for objects by ID,VaR OBJ =

1. Document. Form. Item Problems (1) existing problems: Many statements such as document. formname. Item ("itemname") exist in the existing code and cannot be run in MF. (2) solution: Use document. formname. elements ["elementname"] (3) Others See 2

The code is mainly transferred from the network, and the source is unknown. I made a slight modification to the code.  Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->(Function (){ VaR addevent

The main object of the access control is the document object. Corresponds to all (sub-objects) personal views of the current document. Several methods are provided to access objects. 1. Document. getelementbyid 2. Document. getelementsbyname 3

Sometimes you are proficient in a language, but you will find that you are dealing with other languages all day long. Maybe you think these are insignificant and will not affect your development progress, however, it is precisely these things that

From csdn // I looked at other materials for extraction of CPU, but the Mac's ready-made code did not have the hard disk serial number. After searching for a long time, I found the parameter for extracting the hard disk serial number. So I made it

Ajaxprc is a fast and simple JavaScript remote method call. It allows you to use JavaScript to call the server method. It is based on the JSON data protocol, open-source authorization (lgpl), and can be called synchronously and asynchronously. With