JavaScript

There are three main methodsConversion functions, forced type conversion, and weak type conversion using js variables.1. conversion functions:Js provides two conversion functions: parseInt () and parseFloat. The former converts the value to an

Using a class library can easily solve compatibility issues. But what is the mechanism behind this? Let's talk about it a little bit. First, DOM Level2 defines two functions for event processing: addEventListener and removeEventListener, both of

// Text box name for date = "indate"Function check1 (Form){For (I = 0; I {If (Form. elements [I]. value = ""){Alert ("complete! ")Form. elements [I]. focus ();Return;}If (Form. elements [I]. name = "indate "){Var date = Form. elements [I]. value;Len

JQuery is indeed a very lightweight JS framework that can help us quickly develop JS applications and change the habit of writing JavaScript code to a certain extent. Let's talk nonsense and go straight to the question. Let's take a look at some

Section 1: variables-basic type and reference type [Basic data type]: data segments stored in the stack, such as undefined, Null, boolean, Number, and String Access by value, directly operate on the value in stack memory [Reference Data Type]:

Return false: Blocking form submission does not work. Today, this problem has plagued me for a long time. I have found a lot of information on the Internet. Basically, the following points should be noted about onsubmit = return false: 1. For the

As we all know, JSON is a data format unrelated to the platform, so it is also recognized by the majority of programmers. At present, third-party LIB in various JSON formats are emerging one after another, just like Spring Festival, in the face of

Function Definition A function is declared in this way: the keyword function, function name, a set of parameters, and the code to be executed in parentheses. There are three types of function constructor Syntax: Js Code The Code is as follows: 1.

Preface Both Ext JS 3 and Ext JS 4 have date-based components (of course, earlier versions ). However, you need to select a date to see the day of the week, that is, the day of the year in the date.Unfortunately, Ext js does not provide such

The experiment demonstrates how to implement six simple and common HTML5 Canvas Special filter effects and encapsulate them into a pure JavaScript callable API file gloomyfishfilter. js.The following special filter effects are supported: 1. Reversed

1) highlightjs Highlight. js can color various program source code syntaxes on the page. Supported languages include:• Python • Ruby • Perl • PHP • XML • HTML • CSS • Django • Javascript • VBScript • Delphi • Java • C ++ • RenderMan (RSL and RIB) •

In some complex pages, JavaScript is often used to process the dynamic effects of some DOM elements. In this case, we often use the calculation of the position and size of some elements. The browser compatibility issue is also an important part, to

Using JS to calculate the distance between two points on the earth based on latitude and longitudeRecently, we used the formula for calculating the distance between two points on the earth's surface based on latitude and longitude, and then

When using ajax, you often need to assemble the input data in the form of 'name = abc & sex = 1'. You can easily complete this work using the serialize method of JQuery!JQuery ajax-serialize () method definition and usageThe serialize () method

Image version: Click to view the big pictureThe KeyCode value collected on the internet is convenient for you to find:Keycode 8 = BackSpaceKeycode 9 = TabKeycode 12 = ClearKeycode 13 = EnterKeycode 16 = Shift_LKeycode 17 = Control_LKeycode 18 =

The MAXLENGTH attribute of TEXTAREA in the standard DHTML document does not work by default and only works when an event occurs.Http://spiderscript.net/site/spiderscript/examples/ex_textarea_maxlength.asp:However, TEXT works. ,In TEXTAREA, how can

IntroductionThis section focuses on a very common ECMAScript object-function ), we will explain in detail how various types of functions affect context variable objects and what each function's scope chain contains, and answer questions such as the

Suitable readers: experienced developers and professional front-end personnel.Author: Dmitry A. SoshnikovRelease date: 2010-09-02Original article: http://dmitrysoshnikov.com/ecmascript/javascript-the-core/1: http://ued.ctrip.com/blog? P =

Below is a self-written class, which contains fields and methods.Copy codeThe Code is as follows:// ConstructorFunction Person (name, sex, age ){This. name = name;This. sex = sex;This. age = age;};Person. prototype. getName = function (){Return this.

Paging is almost essential to every external program. In the webform era, many people have used the AspNetPager user control. Many people actually use it because of its advantages: pass it a few parameters to generate a decent page. In fact, this is