JavaScript

Today, remote data loading and page rendering are required in the project, and ajax cross-origin requests are not realized until the development stage. I vaguely remember that Jquery has proposed a solution for ajax cross-origin requests, so I

UpCopy codeThe Code is as follows: continuous upward scrolling link 1 link 2 link 3 Link 4 DownCopy codeThe Code is as follows: continuous downward scrolling link 1 link 2 link 3 Link 4 LeftCopy codeThe Code is as follows:

A friend who is learning javascript can take it as a small exercise. Enhance your coding capability. Reference code:Copy codeThe Code is as follows: ggggg Figure:

1. Ext. grid. GridPanel Main configuration items:Store: Table DatasetColumns: configuration array of table column mode. ColumnModel column mode can be automatically created.AutoExpandColumn: automatically fills the columns that are not used in the

Copy codeThe Code is as follows: operator Bing odd

Generally, two methods can be used to dynamically create elements.1. Dom HTmlCopy codeThe Code is as follows:Var select = document. createElement ("select ");Select. options [0] = new Option ("add-on 1", "value1 ");Select. options [1] = new Option ("

The input loses focus and obtains focus. The text in the search box disappears.When we are doing a website, we often use the search box to get the focus and to lose the focus. because of laziness, every time we write it, it's annoying, in a similar

Substr definition and usageThe substr () method extracts a specified number of characters starting with the start subscript from a string.SyntaxStringObject. substr (start, length) Parameters Description Start Required. The

Usage:Copy codeThe Code is as follows:Str. substring (start, end)"String Literal". substring (start, end) "Start" indicates the starting position of the string to be truncated. The index starts from 0."End" indicates the end position of the string

When using Javascript to declare variables, although the var keyword is used to declare the variables and the keyword is not used to declare the variables, it is not a problem to run in many cases, but the two methods are different. Code that can

An example of the H7N9 infection distribution chart generated using Baidu map JSAPI. The data is from xinhuanet (No. 4.8), as shown below:The list of functions used is as follows:1. Customize the copyright control function, that is, (1) the

1. It indicates that when extjs is used, it is relatively slow to run, especially when there are too many running data and js, it may become stuck or wait for a long time.There are many optimization methods to solve this problem. One of them today

When the user enters the pwd password 123, the page jumps to the second page. After 4 seconds, the page automatically jumps to the third page.Login.htmlCopy codeThe Code is as follows:U: P: OK .htmlCopy codeThe Code is as follows:Log On 5

Data of the undefined type is used when no value is assigned to a declared variable and no declaration is made.Before using js variables, you must declare them first.If an undefined variable x is used, an error is returned.How to determine whether a

Although many languages claim that "Everything is an object", not all values in javascript are objects. Original Value vs objectValues in javascript can be divided into two categories: original values and objects ). DefinitionThe two types of

Copy codeThe Code is as follows: -- select -- a B c d -- select -- 1 2 3 4

Summary of the use of the s: radio tag in struts2 Problem: When this label is used, the default selected items are set. However, after the data is submitted and returned, the selected items cannot be displayed in a single region and are still the

untitled document My space [Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]

1. jump out of the framework and go to the parent page.Jsp:Copy codeThe Code is as follows: Java:Copy codeThe Code is as follows:PrintWriter out = response. getWriter ();Out. write (" ");Return; 2. jump from a framework to the framework named name =

When we submit data through textarea on the page, the content we input will be processed as a piece of content after submission, even if we input a lot of line breaks in textarea, after a piece of content is submitted, what should we do if we need