I was hoping I could do something like this in javascript:
var a = {x:1, y:2};
var b = {x:2, z:3};
b.prototype = a;
And then:
b.x => 2
b.y => 2
b.z => 3
The purpose is to set up "b" as an override of "a".
I know it doesn't work that way because "prototype" is not a magic property on any object but constructors only. Is there a way to implement the above without involving a constructor?
What happens if you do this?
function Person() {}
Person.prototype = 7;
var ted = new Person();
Also what happens if you set Person.prototype to an array or function?
I have part of a script like so:
var audioPlaylist = new Playlist("2", [
{
mp3:"audio/eight-day-week.m4a"
[code]....
According to ECMAScript, the root of the prototype chain is Object.Prototype. Each object has an internal property [[Prototype]] that could be another object or NULL.... However, it also says that every function has the Function prototype object: Function.Prototype, it confused me, because a function is an object, for a function object, what is its function prototype and object prototype..For example:
var x = function (n) {return n+1;};
what is the relationships of x, Object.Prototype and Function.Prototype
I am trying to get to the bottom of javascript object, prototypes etc. I have a fairly good grasp of it, but I get confused the closer I get to the base object.prototype. FIrst of all, I was under the impression that all objects descend directly from Object. But some objects (like Array) seem to inherit properties and methods from the function.prototype. So does this mean that the chain is like this:
object -- function -- array Second, I noticed (on the mozilla javascript reference site that object.prototype inherits properties and methods from function.prototype and vice versa!? How can this be? I must be missing something important about understanding the chain?
Is there a way in Javascript or Jquery to return an array of all objects underneath a certain point, ie. the mouse position. Basically, I have a series of images which link to various web pages but I have a large semi transparent image positioned over the top of the other images. I want to find the href of the background image that the mouse pointer clicks over.
View 1 Replies View RelatedIs there a better way to extend object with internal objects?
$.fn.bestShow = function(s) {
var d = {
width: 0,
height: 0,
order: "numeric",
orderBy: "",
[Code]...
Code:
<script type='text/javascript'>
window.onload = function()
{
document.getElementById('goDirect').onchange = ddmOnChange;
}
function ddmOnChange()
[Code]...
I am curious if there is a benefit to set attributes directly, in my javascript, or to use setAttribute.
For example, I have this:
Is there any way I can allow access to a JS via the <script> but not directly?
View 2 Replies View RelatedI am seeking a method to load one JS file directly into another,
*without* having to dynamically write <scripttags.
Is there any method whereby I can call only one external JS file using a
single <scripttag, but have that external JS file insert into ITSELF
the contents of five others? Code:
I'm attempting to simplify my javascript code when it comes to ajax, but afterwords it only prints 'undefined' to the screen rather than what I want it to print.
I want to be able to put something like this on my main page onclick="document.getElementById('output').innerHTML = print_output();" where print_output() is the ajax function. This way I don't have to use a function to assign values directly to innerHTML and I don't have to muck about with a js file whenever I want to change my page layout.
To do this, I created a recursive function:
function print_output(return_value) {
if a value has been passed to the function, simply return it
if(return_value || return_value == 0) {
return return_value;
}
[Code].....
but like I said, it prints 'undefined' out to the screen. Why isn't this printing the contents that it receives from 'index.php' like it's supposed to?
suppose I have the following:
Code HTML4Strict:
<li id="lists">
<a> ... </a>
<li>
[code]....
here it now selects all a tag in "lists" but I only want it to reference the a tag that is the direct child of "lists" li. I want it to ignore the freen highlighted part.
<li id="lists"><a> ... </a><li><a> ... </a>
<a> ... </a>
<a> ... </a></li>
</li>
I have a requirement that my javascript function can be called directly from the other website. I know how to add the external javascript and then call respective function
<input type="button" value="Testing direct function call of javascript" onclick="CALL THE EXTERNAL JAVASCRIPT(which will call main function in it" />
how can I create such javascript
How i can get current username directly from the system win2000/xp not from the user ....
View 1 Replies View RelatedI'm using the Google Libraries API to load jQuery and jQuery UI. Is it permissible to link directly to component's file on jqueryui site? For instance I'd like to load the tabs component with:
<script src="[URL]"></script>
<script type="text/javascript">
google.load("jquery", "1.3.2");
google.load("jqueryui", "1.7.1");
</script>
<script type="text/javascript" src="[URL]"></script>
I have a simple JSP based application which uses servlets to go between page1 and page2. Page 2 has some date fields on it.
<input name="mydate" id="mydate" type="date" data-role="datebox"
data-options='{"mode": "calbox"}'>
These render fine when I go to page2.jsp directly. If I go to page1.jsp and then click a button, which triggers either a servlet to forward to page2.jsp, then the date fields lose their formatting and appear as standard input fields. I've tried using JSF as the navigation framework with the same results.
Suppose I have a page that I cannot edit(in before "get a real host") but can apply Javascript to. For stylistic purposes, I would like to wrap the contents of the page in a <div> or <table>. Could I use Javascript to insert the needed HTML tags directly after the <body> tag in a fashion similar to document.write? I'm not very familiar with Javascript, but I've tried a few half-baked solutions of my own using GetElementsByTagName('body') and other variants, but no luck. I've tried scanning Google as well but I couldn't find anything that would work for me there either but I'm not sure if that's because I wasn't searching for the right keywords or what.
View 2 Replies View RelatedI am currently using this template by flowplayer.org: [URL]. The functionality I need is the ability to link directly to a specific ajax tab (i.e. Seagram Building, Barcelona Pavilion, New National Gallery). As of now they are just line items without any anchor tags.
View 9 Replies View RelatedI am making a web page, and as part of it I have a table that the user can add rows to. My code works in FF and Chrome, but IE is broken.
function addrow() {
var example=document.getElementById("new");
var addHere=document.getElementById("ticketTable");
var node= example.cloneNode(true);
node.id="added";
addHere.appendChild(node);
}
This code is called when a button is clicked. New is the ID of the row I am adding and ticketTable is the ID of the table I am adding to.
this is my first thread here, but I've read your forum a lot as unregistered user. I've searched the web for a complete Javascript or some hint, but I didn't find an interesting script or article to implement what I've thought. There's a way to write text or number from the keyboard directly in a:
<input type="text" name="display" value="0" maxlength="10" disabled="disabled">
I'm working on an event driven app, which currently adds a listener to each of the relevant elements directly. I am planing on changing this to use a delegated event method but this raised the following question...Which is more expensive navigating the DOM, or adding event listeners?[code]I need to handle the click event of buttons 'b1', 'b2' & 'b3', a set of these buttons can be found in each 'a1' container but not always in the same nested position. To handle the events I need to know the class of the button clicked and the id of its 'a1' container. Would it be more efficient to:
A ) Add just one listener to the 'main' div, having to find the 'a1' containers id by inspecting each parentNode of srcElement until an 'a1_*' match is found.
B ) Add a listener to each 'a1' container, the id of the container can be easily passed as an argument.
I have a j query animated file and i want to make some changes but i'm not good with that : the animation has a title "welcome test" on mouse-over starts the animation but i don't want that, i want the animation to start directly without mouse-over... also i need the image to appear after the animation of the logo ends...
i m working on a website. in which i m using a page which calls on index.php after that web address is called. as it has JS function which make index page open in popup. what i wanna do is now is that if someone (as many of us know root page 90% is index.php), if anyone enter index page directly. JS should check if that person came from redirect.php or not. if not, he will have some sort of error msg.
View 1 Replies View RelatedI'm working on a gallery site using galleriffic. It is composed of 13 seperate galleries (couldn't figure out a way to integrate them into one) and what I would like is an index page which users can jump to any specific image in a gallery. [URL]. There is a current example, and what I'm trying to do is make a drop down menu form where someone could select a piece of granite, (eg. Giallo Latina) and it would jump them straight to that page. However if I link to "butterscotch.html#5" it doesn't work. Is there any way of creating a drop down menu that could handle this?
View 2 Replies View RelatedI am trying to link to a specific nested tab fromanother page. So let's say I'm on the home page, and I want to link to: productspage > Widgets (parent tab #2) > Large Widgets (Parent tab #2's child tab #3). In other words; Directly to a non-default nested tab, from acompletely different page. Linking to the parent tabs works fine (with a standard anchor link e.g.; [URL]), but I can't figure out how to link to one of their child tabs (besides what is set as default)
Here is a stripped down version of the setup I have (I just typed most of it out, so forgive any obvious syntax errors, my pages on the site all validate):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"[URL]">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Site Title</title> .....