JavaScript

IE8/Firefox3.5 +/Chrome4/Safari4/Opera10 has implemented this method. The usage is simple:Copy codeThe Code is as follows:Var str = '{"name": "jack "}';Var json = JSON. parse (str );Alert (json. name ); "Jack" is displayed in the browser that

When writing a program, you often need to remove repeated elements from the array. It is not difficult to implement this function.We can implement it with a two-repeating loop. For small arrays, this is certainly not inappropriate.However, if our

This is similar to the four selection operations in the same code segment below.$ Class ("a"). color ("green ");$ Class ("B"). color ("red ");$ Class ("c"). color ("green ");$ Class ("d"). color ("red ");In the end, only one traversal is

Not very clear can first look at the QQ mail operation, or see the demonstration of this article: http://demo.jb51.net/js/email_qq/index.htmIts functions are implemented in the following three steps:In a recipient box, the group in the contact thin

Two Methods: directly add events to objects and add events to nodesFor example, to add an onclick event whose id is tab1First case:Copy codeThe Code is as follows:Var t = document. getElementById ("tab1 ");T. onclick = function tst (){Alert ('');}

Copy codeThe Code is as follows:Function cut_str ($ sourcestr, $ cutlength ){$ Returnstr = '';$ I = 0;$ N = 0;$ Str_length = strlen ($ sourcestr); // number of bytes of the stringWhile ($ n {$ Temp_str = substr ($ sourcestr, $ I, 1 );$ Ascnum = Ord (

Here, I choose to convert xml directly to json for subsequent processing of javascript applications. I used the. net platform to build a simple webservice.Request. asmxCopy codeThe Code is as follows:Using System;Using System. IO;Using System.

A friend proposed the following application scenarios:After clicking the link on the current tab, the new content is displayed on the current tab. However, the title must be changed to the new title on the previous page. The solution is as

Animation effect. If combined, you can also use simple code to implement the effects of various jquery plug-ins.This article is based on the book "talking about jquery" and is based on your own practical experience. It can be seen as a learning

1Copy codeThe Code is as follows:// Write html content to the pageDocument. write (" Hello World! ")2Copy codeThe Code is as follows:// To prevent JavaScript browsers that do not support JavaScript from displaying JavaScript as page content// The

Caller:FunctionName. caller returns the caller.Let's take a look at the following functions. You can copy them to VS and execute them.Copy codeThe Code is as follows:Function caller (){If (caller. caller ){Alert (caller. caller. toString ());} Else {

The depressing thing is coming. first look at the front-end HTML:Copy codeThe Code is as follows:Quantity purchased: Parts (Inventory ) Use JS values. Pay attention to the JS Code:Copy codeThe Code is as follows:Var num = document. getElementById (

Why DIY jquery tabI have been in contact with jquery for 2 or 3 months, and I have never touched the plug-in. Just recently, I was relatively idle, so I planned to rebuild the existing tabs in projects that were not pleasing to the eye (the existing

Simply put, Jquery's event processing mechanism is equivalent to specifying various events in HTML tags, such as onclick () and keydown (). In the tag, specify the function corresponding to the Javascript event, so that we can fulfill our

Take a look:The opportunity is rare, and there are some technical highlights, So I suddenly invested in function development. In the development of this feature, I still learned some good things, one of which is, how do I preview the uploaded images.

Optimize JavaScript codeAuthor: Gregory Baker, GMail software engineer and Erik Arvidsson, Google Chrome software engineerExperience required: knowledge about JavaScriptClient scripts allow your applications to be more dynamic and active, but the

The EMCA262 specification does not have the class concept. The new JavaScript just makes it look more like c ++ and java. The writing class mentioned here is just the js Code style.1. constructor MethodCopy codeThe Code is as follows:/*** Person

Copy codeThe Code is as follows:Var paramBeanList = new Array ();Array. prototype. addParamBean = function (paramBeanObj ){Var index = this. containParamBean (paramBeanObj );If (index! =-1 ){This [index] = paramBeanObj;} Else {This. push

 1.ExtJS TreePanels TreePanelsIt is a tree control used by ExtJS itself. It is one of the best tree controls currently. It has many advantages, such as support for free drag-and-drop, and ExtJS itself has very well-developed APIs and development

Let's take a look at the definitions of these two methods.Offset ():Obtains the relative offset of the matching element in the current view.The returned object contains two integer attributes: top and left. This method is only valid for visible