javascript

Javascript: Enable checkboxes list when a checkbox is checked (With Prototype)

Guys, Ive been using jquery to do this, but now I need to do it with Prototype and Im little confused due lack of documentation I have 2 lists of check boxes First List: Check box 1 Check box 2 Second list: Check box x check box y check box z I need the JS code, using prototype to work like this: Second list, remains disabled unl...

javascript inserting html code

Hello, I have a situation when there's a table and you can add a new row by clicking a button. The row is dynamically generated by a server and it is passed back in HTML. So basically what i need to do is prefix the new row to the old table. Something like this: tableelement.innerHTML = newHtml + tableelement.innerHTML; That surely w...

Getting ready to learn html5

I'm a desktop application developer, and I plan learning html5, but as it's not released, there are (almost) no published books and not too much infomation for beginners on the web... I feel I should start with html4 and the current web development skills. I think I should start with html4, css, and javascript... but there are so many t...

Communicate with the local machine from a web page

Hello. We have a web application. There are physical devices that we need to be able to communicate with, and we have access to all of our clients computers to install whatever software we need. Now, for the question: Is there a way to make this browser-agnostic? As in, not requiring ActiveX controls? One of my ideas was to install a c...

HTML to automatically hide text depending on scrolled size (like in Gmail)?

Look at your Gmail inbox. You have 3 main columns contains the Sender contains "THE_EMAIL_SUBJECT - THE_EMAIL_BODY" the date the email was sent on I note that when you resize the window, the Gmail web client automatically resizes the displayed text in the second column. It basically just truncates the text so that it always can displ...

Best practices managing JavaScript on a single-page app

With a single page app, where I change the hash and load and change only the content of the page, I'm trying to decide on how to manage the JavaScript that each "page" might need. I've already got a History module monitoring the location hash which could look like domain.com/#/company/about, and a Page class that will use XHR to get the...

JQuery - Extend and Access Superclass

Is there a way to access the super object when extending objects using $.extend? I would like to extend an object, override a method, but call the overridden superclass method in the subclass method. ...

Convert facebook date format to javascript date

Hi i'm getting events from facebook with fql and javascript sdk. How can i convert the facebook format date in a javascript date? thanks ...

iframe created dynamically with javascript not reloading parent URL

I can't seem to reload the parent page from within an iframe even though the domain for my iframe and the parent page appear to be the same. The IFRAME was created dynamically, rather than in the HTML page source, so could that be the problem? The iframe I'm working with is here http://www.avaline.com/ R3000_3 once you log in. You may ...

how to convert the string into json object?

I use the ajax which sends back a string.. I want to convert the responsetext into a json object to process. I tried eval and also , but doesn't works... Wht to do? My code is function handleResponse() { if(httpa.readyState == 4){ var response = httpa.responseText; if(response!='empty') { alert(response); ...

Spoof referrer to Google Analytics?

Whenever a user visits "Page A" on my site, I immediately redirect him to "Page B" by setting window.location with Javascript. "Page A" has no Google Analytics tracking on it -- when someone is redirected from "Page A" to "Page B" I want to track him as if he entered the site via "Page B". Unfortunately, my current setup breaks referrer ...

Event bubbling with img tags?

I did some googling and figured I'm probably experiencing so called "event bubbling" that I've never heard of but are not surprised by it's existance. I want it to fire only once and I'm wondering how to fix this. Basically, I have this small code snippet: $('.bggallery_images').click(function () { alert('test'); }); ...

Google Chrome Extension

How do I open a link in a new tab in the extension HTML. E.g. clicks on icon sees Google chrome window which has the window.html inside there are two links, one link to open a link in a new tab, other in the original tab. I used window.location, doesn't work like that. ...

Issue with DOM manipulation (blockUI or alert()) during a onchange request - prevents other event from firing.

EDIT: I wrongly assumed this was caused by blockUI(); I was using Firebug's console.log to log the message but for the example here I changed to alert so you wouldn't need firebug to replicate. Once I tested it again, I was able to remove blockUI and the onclick didn't fire not firing. The issue seems to be whenever the DOM is changing...

jQuery: Scroll the window then addClass() - how to callback

Inside a jQuery event handler, I would like to scroll the window and then add a class to something. This is my code: $('#foo').click(function() { window.scrollTo(y); $('#bar').addClass('active'); }); $(window).scroll(function() { $('#bar').removeClass('active'); }); Notice I have another handler to remove that same ...

How to change syles of a webpage inside iframe from parent

I would like to load a webpage on an iframe and then change some styles from the parent page through javascript. The webpage to load on an iframe isn't on my domain. I mean, it can be some random page on the web. Is this possible? If so, how? ...

How to load jQuery if it's not already loaded?

Hi I'm working on a weather widget, so in order to optimize it i want to check if jQuery has been loaded in the page, if Not, the widget will load it from my website. Because not all the websites use jQuery. how to do that? Example of how to put my widget: <html> blah blah blah ................. <script src="http://www.xxx.com/weather...

Coping with weak typing

I'm a front end Flex developer peeking over the wall at html. One of the things I have a hard time with is weak typing in Javascript. I know many developers say they prefer it. How do I stop worrying and learn to love the weak typing? Are there best practices for variable naming that help make var types human readable? Another thing I h...

What's a good way to format AJAX responses? Or, using Django templating with AJAX

In some of the code I'm working on, the author max AJAX calls to a Django view that returns JSON. Once the JSON is retrieved, it'll be injected into the page with a function that looks like this (note, this is a simplification, but I'm sure you know what I'm getting at here): function build_event_listing(events) { var html = ''; ...

How to clear textarea on click?

Given a <textarea> with a default value as follows: <textarea>Please describe why</textarea> How do you clear the default value when the user clicks to edit the field? ...