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Basic Javascript knowledge (2) Events and basic javascript knowledge Event object: (the event object is the property of the window object. when an event occurs, an event object is generated, the Event ends, and the event object disappears) In IE:

1. How to define variables? How do I check whether variables are defined? How to delete a variable? Determines whether a variable is null?Isset ()Unset ()Empty () 2. What is a variable?A variable name can be dynamically set and used.$ A = 'hello', $

Character StreamThe byte stream provides the ability to handle any type of input/output operation (because everything is 0 and 1 for a computer, it is enough to simply represent the data in bytes), but they cannot manipulate Unicode characters

Stream classJava's streaming input/output is based on four abstract classes: InputStream, OutputStream, Reader, Writer. They are used to create specific stream subclasses. Although the program performs input/output operations through specific

The program can realize the basic arithmetic operation, and can control the precision of the result of operation effectively, and realizes the memory related function.The functions are as follows:MC: Clear Storage Data MR: Read stored data is

7. Multimedia① scrolling Subtitles scrolling Content ...② properties:align-----alignment (top middle bottom)Scroll-----Unidirectional MotionAlternate-----round-trip movementSlide-----such as slides, a chattered, if the text of a contact left on the

Java collection classesThe collection classes for Java are located in the Java.util package, where the Java collection holds references to objects, not to the object itself.There are three main types of Java collections:1.Set (SET): Objects in the

Cardboard SDK for unity useThe previous article as the beginning of the series, mainly about some of the virtual reality of the technology and principles, this article will lead you to see Google's cardboard SDK for Unity, although the current data

Event. clientX returns the X coordinate value of the last mouse clicked;Event. clientY returns the last mouse Y coordinate value;Event. offsetX returns the X coordinate value of the current mouse hover.Event. offsetY returns the Y coordinate value

Selectors allow you to manipulate element groups or individual elements.JQuery SelectorIn the previous chapters, we showed some examples of how to select HTML elements.The key point is to learn how the JQuery selector accurately selects the elements

From IBM DeveloperWorksBrief introductionCSS (cascading style sheets) is a long-standing, markup language that, together with HTML, is widely used in the World Wide Web (Wide). HTML is primarily responsible for the definition of document structure,

Click () object. click () enables the object to be clicked.Whether the closed object window has been closed; true/falseClearTimeout (object) clears the set setTimeout objectClearInterval (object) clears the set setInterval objectThe confirm ("prompt

Ext. form. Field. prototype. msgTarget = 'day ';// Define the formVar simple = new Ext. FormPanel ({LabelWidth: 75,BaseCls: 'x-plain ',Width: 150,DefaultType: 'textfield ', // default Field Type// Define the form ElementItems :[{FieldLabel: 'account

/* "Array function" *///statistical calculationCount counts the number of cells in an array or the number of properties in an objectArray_count_values the number of occurrences of all values in the statistics arrayArray_product computes the product

* HTML* Html:hypertext Markup Language Hypertext Markup Language.* HTML is the most basic web language.* HTML code is made up of tags.* Basic HTML formatInformation that holds properties, accessible informationIntroduction of external files

CSS Basics points SummaryCSS refers to cascading style sheets (cascading style Sheets)Techniques for formatting Web page content1. Style rulesInline (inline) this label styleInside (inline) head inside styleExternal (outer) head inside linkStyle

11 Laying out with CSS11.1 Considerations for starting Layouts1 is also to emphasize the separation of content and display2 Layout method:Fixed layout: The entire page and the contents of each column have pixel-based widths.This means that the width

jquery selector (see the jquery Handbook for details)jquery Selector Detector: http://www.runoob.com/try/trysel.phpID selector $ (' #demo ') document.getElementById (' demo ')Class Selector $ ('. Demo ') Document.getelementsbyclassname (' demo

This article focuses on the use of the jquery reset (reset) Form method, the need for friends can refer to the following Original address: http://www.hpboys.com/820.html Because of jquery, the submission form is like this: $ (' #yigeform ')

If a string function provides a binary string as a parameter, the result string is also a binary string. The number converted to a string is treated as a binary string. This only affects the comparison. If a string function provides a binary string