JavaScript

Example function SelectAll (ID) {var h = document, I = H.getelementbyid (id), D, G;if (H.body.createtextrange) {D = Document.body.createTextRange ();D.movetoelementtext (i);D.select ()} else {if (window.getselection) {g = window.getselection ();D =

Under normal circumstances we all require the third party JS do not affect their own site loading speed, even if he hangs, also do not affect document TESTSTTST Change into

Null and undefined are two types of JavaScript, and the values of the types are as follows: type value Null Only one value is null Undefined Only one value undefined Null indicates

Let's look at what this difference points to in these situations: 1. This in the global code: 1 alert (This)//windowThis in the global scope will point to the global object, even window in the browser. The code is as follows Copy

Order of singular groups Sort () function The sort method of an array object can rearrange the array elements in a certain order. Usually, they are arranged in the order of subtitles. When sort () is used, the comparison function is executed each

The original small air (hill) said to me, use object objects less than the array object, because the efficiency of the object is higher, and today just write a JS encountered an array or object with the problem, so simply write the test page.

Usually our writing cycle is roughly like this: The code is as follows Copy Code function () {The way of writing general circulationfor (var i=0; i...}} Optimization variable Declaration The above writing in

Example we're going to bind a carriage return event The code is as follows Copy Code $ (function () {Define carriage return Eventsif (Document.addeventlistener) {//if it is FirefoxDocument.addeventlistener ("KeyPress",

Javascript Follow Plugin Js following scrolling effect plugin Support for defining multiple follow IDs, using CSS fixed attributes, not supporting IE6, and compatible with other mainstream browsers. Support defines the minimum height of scrolling

Get URL parameters: The code is as follows Copy Code function Geturlparam (name) {var value = Location.search.match (New RegExp ("[?]" + name + "= ([^&]*) ([O.)", "I"));return value? decodeURIComponent (Value[1]): value;}

Array manipulation functions Join (delimiter) to use delimiters (delimiter) for each element in the array as a stringConcat (Array1, array2, ...) Merges the array, does not affect the original array, but returns the merged new arrayPop () deletes

Web effects four dynamic display of time date code in Web pagesDisplaying the date time in a Web page is more commonly used, and I've collected four display methods that I hope will help a lot. Take the parts and make a string connection code

Use when you link to Location.replace (URL) ">JavaScript Mask main Window scroll bar Add it to the body tag.Style= "Overflow-y:hidden"JavaScript screen screen, constantly emptying clipboardAdd it to the body tag.Onload= "SetInterval ('

Split syntax The decomposition method divides the specified string into strings based on the regular expression or condition. 　　method returns an array of each section found in the string. 　　RegExp See the reference entry. String.Split (separator,

Conditional statementWhen you write code, you often need to perform different behaviors according to different conditions. You can use conditional statements in your code to accomplish this task. In JavaScript, we can use the following conditional

A long time ago wrote a universal validation function, we do not laugh ah, many things are not perfect, such as date validation. Name: Password: Theme: expression: > content:

Tip: You can modify some of the code before running PHP java . NET

Tip: you can modify some code before running Tip: you can modify some code before running

Tip: you can modify some code before running Leisure and EntertainmentFood & BeverageConvenient lifeTravelShopping WorldEducation and TrainingDecorationAutomotive WorldOther categoriesMerchants enter more merchantsBeijing Hua Xu digital

Html5 is widely used. To improve user experience, some html5 is often added to webpages. When users browse our websites, js checks whether the browser can support html5, then, give the user a prompt and guidance.Method 1:If (typeof (Worker )! =