JavaScript

Some of the selection statements in JavaScript: 1, if statement the code that executes the condition when the specified condition is true. 2, If...else ... Statement executes the code when the statement specifies that the condition is true, and

To recommend a native JavaScript version of the game, source download, the home page as shown in the following figure: First look at how HTML is laid out in the index.html file: Copy Code code as follows: The Index.css files

Traditional cryptography does not play a big role in today's network security, but every book that tells cryptography is the first to introduce them, because they are the basis of cryptography, the history of cryptography. Almost every cipher book

Yesterday saw a micro-blog: "22 line of JavaScript code to achieve the QQ group member extractor. The spirit of curiosity to click in, found no effect, one is the QQ version upgrade, the second is the code inside the blog is also a bit

Validation rules: 1. Broadcast MAC address (FF:FF:FF:FF::FF:FF:) 2. IPV4 & IPV6 Multicast MAC address 3. Numeric character Code list: Copy Code code as follows: function isvalidmacaddress (address) { var c = '; var i = 0, j = 0;

First, Document.formName.item ("itemname") problemProblem description: Under IE, you can use Document.formName.item ("ItemName") or document.formname.elements["ElementName"];firefox, You can only use the

This document collates most of the accepted, or less controversial, JavaScript good writing specifications (best Practice). Some of the obvious common sense is no longer discussed (for example, to use objects to support identifying judgments, rather

Copy Code code as follows: Date Automatic input control Birthday: * HTML page in the order of the JS execution:1 The first execution within the head tag2 execution within the body tag3 when the body tag added the

In JavaScript, Void is an operator that specifies that you want to evaluate an expression but not return a value.void operator usage format is as follows:1. javascript:void (expression)2. Javascript:void expressionExpression is an expression of the

Parsefloat () method in JavaScript produces precision problems Copy Code code as follows: The A,b,c addition would have been 1.3921, but the sum1 result was: 1.3921000000000001, this is not the desired result, especially when

Copy Code code as follows: javascript Rounding (Math.Round () and Math.pow ())

1. The standard method Copy Code code as follows: Example: (' http://www.jb51.net ', ' 500px ', ' 400px ', ' no ') ' > click 2. It is to be noted that Firefox does not support this feature, it supports the syntax is window.

Before learning the variable scope of JavaScript, we should be clear on a few points: The variable scope of the JavaScript is based on its unique scope chain. JavaScript does not have a block-level scope. • Variables declared in a function are

Basic knowledge First of all we need to know about module mode (2007 by Yui's Ericmiraglia in the blog), if you are familiar with Module mode, you can skip this section, directly read "Advanced mode." anonymous function closures Anonymous

As follows, we define the enumeration of week: Copy Code code as follows: if (typeof weekday = = "undefined") { var weekday = {}; Weekday.sunday = 0; Weekday.monday = 1; Weekday.tuesday = 2; Weekday.wedesay = 3;

The counting sort (counting sort) is a stable sort algorithm. The count sort uses an extra array of Count_arr, where the first element is the number of elements in the array arr that are to be sorted to the value equal to I. The elements in the Arr

Copy Code code as follows: /* Each object instance has an attribute member for a prototype (prototype) that points to its instanceof object (tentatively called the parent object) We refer to the relationship of this layer to the parent

JavaScript in the multiplication of floating-point numbers, there will be a number of decimal places.This is because in the operation of the first floating-point number into binary after the operation, but some decimal in the binary code after the

In JavaScript, extracting substrings is mainly done through Slice, Substring, Substr, one of three methods. Copy Code code as follows: Slice Syntax: String.slice (start [, stop]) "Good news, everyone!." Slice (5,9); ' News '

The importance of referrerThe HTTP request has a Referer header that indicates the source reference page for the current traffic. For example, click on a link on the www.sina.com.cn/sports/to reach the cctv.com home page, then referrer is