JavaScript

Three characteristics of object-oriented language: inheritance, polymorphism, encapsulation, these three points although JavaScript does not provide a natural syntax implementation, but we can all through the prototype and other techniques to

2d-position allows you to move an object that is absolutely positioned by dragging.The position attribute of the AbsolutePosition setting element is "absolute" (absolute).BackColor Sets or gets the background color of the currently selected

1. Previously written is always a decentralized function, what function to write what function, feel not tidy, so this time to write the package of classes, used to be good, but the transfer parameters encountered a lot of problems, so, a lot of

1. Case sensitive 2. Weakly typed variables All variables are marked with the VAR keyword, and the JavaScript interpreter automatically assigns 3. The end part of the sentence is optional such as : Var name=23; or var name=23 can be

JavaScript Delete Example Copy Code code as follows: var flower={}; Flower.name= "OOP"; Delete Flower.name; True alert (flower.name); Undefined Create an object named Flower Flower has member name, value "OOP"; Delete

Form Instances This is a form of strength. Here is a small problem: because my server is not supported now, the form cannot be submitted. I will print out your input and return a false so that the form is not submitted. OnSubmit's code does two

This method returns the cosine of a number. The cosine method returns the value between 1 and 1, which represents the cosine of the angle.Grammar Math.Cos (x); The following are the details of the parameters: X: a number.

This method returns the inverse tangent of its parameter quotient. The ATAN2 method returns the value between the angle theta of the-pi and Pi (x,y) points.Grammar Math.atan2 (x, y); The following are the details of the parameters:

The date of the JavaScript date.tolocaledatestring () method is converted to a string and the "date" section is returned using the conventions of the operating system's locale.Grammar Date.tolocaledatestring () The following are the

The JavaScript date.sethours () method sets the hour at the specified date according to the local time.Grammar Date.sethours (hoursvalue[, minutesvalue[, secondsvalue[, Msvalue]]) Note: The parameters in parentheses

The JavaScript date.setfullyear () method specifies the date of the year according to the local time.Grammar Date.setfullyear (yearvalue[, monthvalue[, Dayvalue]) Note: The parameters in parentheses are optional The following are the

The JavaScript date.setdate () method sets the day of the month, at the specified date, according to the local time.Grammar Date.setdate (Dayvalue) The following are the details of the parameters: Dayvalue: An integer from 1 to 31 that

The JavaScript date.getutcseconds () method returns the second of the specified date according to the Universal Time. The value returned by getUTCSeconds is an integer between 59 and 0.Grammar Date.getutcseconds () The following are the

Document.title//Set document title equivalent to HTML title tag Document.bgcolor//Set page background color Document.fgcolor//Set foreground colors (text color) Document.linkcolor//not-clicked link color Document.alinkcolor//Activate the color of

RegExp classThe RegExp object's constructor can take one or two argumentsThe first parameter describes the pattern string that needs to be matched, and if there is a second argument, this parameter makes an extra processing instruction.first, the

DOM Basics-Creating tables The use of JS to dynamically create a table has two formats, appendchild () and InsertRow, InsertCell (). But the first one is likely to have problems with IE, so it is recommended to use the second type. 1, InsertRow

Copy Code code as follows:

[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform] Copy Code code as follows: How fast you're going to be Array.prototype.sort var a=[4,723,3,5,67,32,4,43,34,545,43,43,,234,7,367,7,87,23,6,7

The RegExp object in JavaScript is used for regular expression-related operations, and this object provides a method test to determine whether a string satisfies a pattern. The return value is True/false. Today I came across a question:

Objective This article summarizes seven ways to exchange A and B variable values var a = 123; var B = 456; Exchange Variable Value scheme one The easiest way to do this is to use a temporary variable, but it's too low to use a