JavaScript

Functional FunctionMultiple statements are encapsulated by functions and executed anywhere . JavaScript functions do not overload, the same name function, the name of the function after the definition of functions through the keyword

Chapter Two: Using JavaScript Attention: 1, in the use of string , the browser will be considered to be the end tag and produce an error. 2, when parsing external JavaScript files, the processing of the page will also be paused

Function checklength (strtemp,maxlength)  {    var i, sum, count, charcode;    count = strtemp.length;    sum = 0;     for  (i = 0; i  maxlength)  {             var v =  Strtemp.substring (0, i);                         return v +  "...";         }  

In some cases where multiple nested for loops are usedBreak and continue will be used to jump the loop.Break is jumping out of the loopContinue is to jump out of the current loop and continue the next loopThe multi-layer for loop nesting uses these

String definitions:1,var mystring= "content"; or var mystring= ' content '2,var mystring= New String ("content") creates an object---, but adds overheadContent:1, adding single quotation marks (double quotes) in double quotation marks (single quotes)

Window Object1. Is the core of the BOM, the window object points to the current browser window, one of the top level objects. 2. All JavaScript global objects, functions, and variables automatically become members of the Window object3. Global

-------------------Willingtolove;This article link: http://www.cnblogs.com/willingtolove/p/4745889.html1. Scope of variables:In JavaScript, the scope of a local variable is determined by the function it defines, and the nested function can access

1 Array.concat (item ...)The Concat method produces a new array that appends one or more item to the arrayvar a = [' A ', ' B ', ' C ']var b = [' X ', ' y ', ' z ']var c = a.concat (b, true);//b is [' A ', ' B ', ' C ', ' X ', ' y ', ' z ', True]　　2

In addition to creating objects, the constructor (constructor) also does another useful thing--automatically sets the prototype object (prototype objects) for the new object that was created. The prototype object is stored in the Constructorfunction.

Understanding Parameters1. The number of command parameters does not have to be the same as the actual number of parameters, but you need to know the actual number of parameters can be obtained with arguments.length. 2.arguments objects can be used

The very first thing to understand when we're talking about This-keyword are really understand what ' s the purpose of the TH Is-keyword is, or why we even has this-keyword in JavaScript.What's the This-keyword allows us to does, is it allows us to

Problems with JavaScript floating point arithmetic (multiplication)

Single number IIGiven an array of integers, every element appears three times except for one. Find the single one.Note:Your algorithm should has a linear runtime complexity. Could you implement it without using extra

The development of the program can not be separated from the code reuse, through code reuse to reduce development and maintenance costs, when talking about code reuse, the first thought of inheritance, but inheritance is not the only way to solve

in the first JavaScript video summary blog, a macro understanding of JavaScript was made. Among them, I do not know if you can remember, the core part of JavaScript include Which? The core of JavaScript consists of three main parts:1.ECMAScript, if

JavaScript design pattern-interface implementation 1. Interface(1) What is an interface?An interface provides a means to describe the methods that an object should have. Although it can indicate the semantics of these methods, it does not specify

Js implements code similar to the menu style TAB effect, jstab This article describes how to implement the TAB effect code similar to the menu style in js. Share it with you for your reference. The details are as follows: This is a simple set of TAB

Common html tags: 0 and html tags HTML Typographical tags: 1. paragraph tags 2. line feed label 3. display a line on the page Block-level labels: 1. the block-level labels will wrap 2. line labels do not wrap Font Tags: 1. font tags

A Brief Introduction to the margin parameter and a brief introduction to margin A Brief Introduction to the margin parameters: This attribute is used to set the outer margin of an element. It is no longer described here. The only problem that may

CSS layout page, css layout Create a CSS file as follows: 1 @charset "utf-8"; 2 /* CSS Document */ 3 *{ 4 margin:0px; 5 padding:0px; 6 border:0px; 7 } 8 #box{ 9 width:1100px;10 height:760px;11 margin:auto;12 }13 #hen14 {15