JavaScript

Branching is an optimization mode when initializing. Browser sniffing (functional detection) is a typical example when it is known that a condition will not change throughout the life of the program, and it is only useful to test the condition once.

function Makedatabook () {var xls = new ActiveXObject ("Excel.Application"); xls.visible = True;var Newbook = xls. Workbooks.add;newbook.worksheets.add;newbook.worksheets (1). Activate;xls. ActiveWorkBook.ActiveSheet.PageSetup.Orientation = 1;xls.

This usage of javascriptNanyiDate: April 30, 2010This is a keyword in the JavaScript language.It represents an internal object that is automatically generated when the function is run, and can only be used inside the function. Like what

Through the analysis of direct insertion sequencing, it is known that the time complexity is O (N2), but if the sequence to be sorted is positive, its time complexity can be increased to O (n). Hill sort is the sort of improvement that is made. The

Method One:HTML code: News Comments Technology Reviews JS Code:function Settab (m,n) {var Tli=document.getelementbyid ("menu" +m). getElementsByTagName ("Li"); var mli= document.getElementById ("main" +m). getElementsByTagName ("ul"); for (i=0

In the writing of JS code, a variable is often used for type detection. Common types of detection methods are: typeof Object.prototype.toString Constructor instanceof typeoftypeof can identify basic data types (except null),

When making a Web page, you need to pop up a small window, and then to implement a function is to click the hyperlink to close a small window and open a new page, just like:This is a small window, click the Hyperlink this window will be closed and

javascript Control page 5 seconds after the automatic jump code 5 seconds after auto jump to http://www.jb51.net/JavaScript Countdown page

The code is as follows: varHead = document.getElementsByTagName (' head ') [0]; varScript = document.createelement (' script '); Script.type= ' Text/javascript '; Script.charset= ' GBK '; Script.onload= Script.onreadystatechange =function() {

function_browser () {varIeax =window. ActiveXObject; varIemode =Document.documentmode; varIever = _getieversion () | | Iemode | | 0; varIsie = Ieax | |Iemode; varChromiumtype =_getchromiumtype (); return{isie: (function () {

Js implements photo album page turning, scrolling, switching, and carousel functions (1) When we were doing web development, the front-end performance requirements were very high, because for users who do not understand the program, the visual

Javascript exercise questionsQuestion 1 Var a = 1; var B = a; a = 2;B =? Answer: B = 1; Question 2 Var a = {a1: 1, a2: 2}, B = a; a. a1 = 3;B. a1 =? Answer: B. s = 3; Question 3 Function sum (a) {a = a + 1; return a;} var a = 1; var obj = {a: 1,

Javascript scope chainScope chain A function has a scope chain.Each time a function is called, an object is created in the scope of the function. The local variable of the function is assigned to the new object as an attribute.Therefore, for nested

Jacascript expressions, operators, statements, and strict ModesExpression {// key-value x: 1; y: 2 ;}[1, 2] Three undefinedVar o = new Object (); {o. x = 1; o. y = 2;} o. x = o ['X'] (the property name is automatically converted to a string)Special

Javascript event bubbling and event capture details, and javascript details Event bubbling and event capture are proposed by Microsoft and Netscape respectively. These two concepts are designed to solve the problem of event streams (event occurrence

Example of using javascript to delete the Element Node removeChild (), using javascriptremove This example describes how to delete the Element Node removeChild () using javascript. Share it with you for your reference. The specific analysis is as

How to Implement the flying advertisement effect using Javascript This article describes how Javascript achieves the effect of flying advertisements. Share it with you for your reference. The specific implementation method is as follows: ?

How to Implement the menu in the pop-up menu of the javascript custom right-click menu This article describes how to implement a menu by right-clicking a javascript custom menu. Share it with you for your reference. The specific implementation

JS + DIV implements the method of mouse over the switching Layer Effect, jsdiv This article describes how to achieve the effect of moving the mouse over the switching layer using JS + DIV. Share it with you for your reference. The specific

Javascript: The method for implementing the flying advertisement effect. This article describes how Javascript achieves the effect of flying advertisements. Share it with you for your reference. The specific implementation method is as follows: