JavaScript

MouseDown when creating drag objects, MouseUp release objects, the principle of clear is actually very simple. Simple Drag Implementation code: simple Drag implementation Drag Me & Lt;script type= "Text/javascript" > var VVG = {};

DOM elements have standard events that you can use only when using onclick=function, but when you need to add multiple events to a DOM element, delete events, or add custom events to a encapsulated control when you encapsulate a control with

1. Warning Prompt boxAlert ("Text"). Ex. [Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform] 2. Confirm Prompt box (confirm, return True or False)

Copy Code code as follows: var A; Declare a variable with an identifier of a function A () {//Declaration of functions, identifiers also for a } Alert (typeof a); Displays "function", which means that the function has

Create an Array object Copy Code code as follows: One var avalues=new Array (); Two var avalues=new Array (20); Three var acolors=new Array (); acolors[0]= "Red"; Acolors[1]= "Green"; Acolors[2]= "Blue";

If statement Grammar: Copy Code code as follows: if (condition) { Statement1; } else{ Statement2; } Iteration Statement 1, do-while statement Grammar: Copy Code code as follows: do{ Statement

Brief introduction Starting from this chapter, I will successively (translate, reprint, organize) http://dmitrysoshnikov.com/website about ECMAScript standard understanding of the Good article. In this chapter we will explain the various types of

first, the question of the proposed Let's take a look at the following code, and note that the following code does not run in the browser's developer tool (such as Firebug, Chrome Developer tool), which is explained later: Why we can delete an

1.1.1 Summary Believe that you have C + +, C # or Java programming experience, you are familiar with this keyword. Since JavaScript is an object-oriented programming language that contains the This keyword as C + +, C #, or Java, we'll introduce you

2.1 Grammar Case sensitive, variable weak type, end-of-line semicolon optional, comment double slash, bracket indicates code block 2.2 Variables Variables are declared with VAR, the variable's naming rule: the first character must be a letter, an

The first time to be swallowed, superficial understanding, feeling suddenly, the result of sleep at night to find a lot of problems, what do not understand, see the second time, found that is so. After a few days to use, found that the original

The earliest curry function is a bit polymorphic in that it chooses the internal branch according to the function parameters: Copy Code code as follows: Http://www.openlaszlo.org/pipermail/laszlo-user/2005-March/000350.html ★★on 8

Sorting code Copy Code code as follows: function sorttable (Stableid, Icol, Sdatatype) { This.otable=document.getelementbyid (Stableid); This.otbody=this.otable.tbodies[0]; This.coldatarows=this.otbody.rows; This.atrs=[]; This.icol=

In other words, moving to the object's child object is also onmouseout. But that often does not reach the desired effect we want. This is due to the bubbling characteristics of the JavaScript itself (that is, triggering an event on a child element

JavaScript type functions (such as NUMBER/STRING/BOOLEAN/ARRAY/DATE/OBEJCT, etc.) are inherited from the Function.prototype, so adding a method to the Function.prototype also affects the underlying type function derived from it. Such as: Copy

Algorithm root:In general, the 9th digit of the vehicle identification code is the inspection bit, which can be indicated by any number or letter "X" in 0-9. The number of other positions and the meaning of the letters may be different, but after

Core code: Copy Code code as follows: function QuickSort (arr) { If the array has only one number, it returns directly; if (arr.lengthreturn arr; } Find the index value of that number in the middle, and if it's a float, take

The concept of scope in JS: Represents the area in which a variable or function works, referring to the context in which they are executed, that is, the context execution environment. JavaScript has only two scopes: global scope and local scope,

1. Each function contains two methods that are not inherited: Apply () and call (). 2, they are used the same, are in a specific scope of the call function. 3, receive parameters, apply () receive two parameters, one is the scope of the function run

In your project, you need to quickly detect whether the browser supports a CSS3 feature, such as detecting whether "transform" is supported, and then my layout will have two completely different layouts. Of course, aside from the quick approach