javascript getelementsbyclassname

HTML is not organized or unknown, it is almost impossible for you to have a good scripting scenario-it is possible that you will either create too many tags with javascript or the application is too dependent on JavaScript. There are some things to consider in HTML, that is hook and node relationship. The original and most important hook for HTML is the ID, and the ID can be accessed through the fastest Do

This article mainly introduces how to convert the date format in javascript, which is very simple and practical and can be used frequently in projects. We recommend this article to you. The Code is as follows: Date inputScriptWindow. onload = function (){Var aLaydate = document. getElementsByClassName ("date ");For (var I = 0; I {ALaydate [I]. onchange = function (){Var dateValue = this. value;DateValue

Sometimes we need to trigger an event without returning a value during js writing, so we may need to write href = "#", which contains a location information. the default anchor is # top, that is, the top of the Web page. When you click this link continuously and quickly, the browser slows down or even crashes. Of course, we generally use three href = "###", but after reading this article, we can use javascript:; (a colon and a semicolon) In

or unknown, it is almost impossible for you to have a good scripting solution-it is likely that the following situation will occur: either too many tags will be created using JavaScript, or the application is too dependent on JavaScript. There are some things to consider in HTML, that is, the relationship between hooks and nodes. The first and most important hooks of HTML are ID, and Id can be acces

This article mainly introduces the differences between JavaScript and HTMLDOM and related information about the relationship between Javascript and DOM. For more information, see the following differences: Javascript JavaScript is the most popular Browser Scripting language on the Internet. Easy to use! You will love

. This book focuses on JavaScript, so let's take a look at its implementation code [Example 5-2 ]. 35. eg. getDataList = function (min, max) {// The modulo end provides the pseudo-constructed data. In fact36. var lst = [], n = 8; // save data37. for (var I = 0; I 38. var k = min + parseInt (Math. random () * (max-min); // number of random specified ranges39. lst. push (k + ". jpg"); // concatenate the string40 .}41. return lst; // returns an array.42

This article briefly introduces two methods for customizing templates in javascript, which are illustrated in great detail. We recommend them to our partners here. /*** Created by Administrator on 15-1-19. */function functionUtil () {} functionUtil = {// whether a DOM node has an attribute hasAttr: function (el, name) {var attr = el. getAttributeNode el. getAttributeNode (name); return attr? Attr. specified: false}, // getByClass: function (sClass, o

This article briefly introduces two methods for customizing templates in javascript, which are illustrated in great detail. we recommend them to our partners here. /*** Created by Administrator on 15-1-19. */function functionUtil () {} functionUtil = {// whether a DOM node has an attribute hasAttr: function (el, name) {var attr = el. getAttributeNode el. getAttributeNode (name); return attr? Attr. specified: false}, // getByClass: function (sClass, o

same class name El[el.length] = _el[i]; }} return El; }If the passed-in class name is not found, then EL is a null value. The return is an exception.After encapsulating the Getelementsbyclassname () method, you can use it as a built-in JavaScript selector! (--pretend to be built-in!!) ）While this custom method works the same as the jquery selector, using the custom

;Pearli> li class="Fruit">Orangeli> ul> body>html>The above document model can be represented by the following family tree:Obviously, in this family tree, HTML is the root element.HTML has 2 child, each of which is head and body. Both of them are child nodes of the root element. At the same time, they are all brothers nodes. HTML is their parent node.Continuing down, we can see that the body has 3 child nodes. The H2 are respectively. P. UL, these three are sibling nodes, they have a co

Translation: cloudwaterAuthor: Douglas CrockfordSource: http://javascript.crockford.com/code.html Reprint URL: http://www.yaohaixiao.com /? P = 196 This is a set of encoding specifications applicable to JavaScript programs. It is based on Sun's Java coding specification. But it was significantly modified because JavaScript is not Java. The long-term value of software is directly derived from its coding qual

. Do not allow local variables to overwrite global variables. function declaration All functions are declared before they are used. The declaration of the inner function follows the VAR statement. This helps to determine which variables are within the scope of the function. There should be no spaces between the function name and ((opening parenthesis). (closing parenthesis) and a space should be inserted between {(opening curly braces) of the starting program body. The function program body s

follows:var lis= document.getelementsbytagname ("Li"); alert (lis.length); Can be used for lists, etc.3) Document.getelementsbyname: Gets an array of the specified node names according to the name of the tag, the length property of the array object can get the lengths of the array, for example:var gendernodes=document.getelementsbyname ("Gender"); alert (gendernodes.length); Can be used for multiple boxes, etc.4) Other two methods IE is not supported, so it is not recommended to use5) Body: Get

Javascript basics-Understanding javascript and javascriptJavascript basics-Understanding javascript Every language begins with HelloWorld. I also follow this principle today! First, let's get to know about javascript. This is a very simple program. When you open the page, the alert method will be called. A prompt box

the same. In this example we look for P in docunment (the entire page document), find all the P elements in the page, and store them in X. We're going to get a third p tag, so it's x[2]. The example above is looking for the P tag in its id=main div, so we find two P, and the second p is certainly y[1].Looking closely, we find that searching by ID is the only element in the document, so getElementById is element. And, looking through the label, getElementsByTagName is elements.Find HTML elements