javascript

Dealing with missing messages in JavaScript when using BOSH

We recently went into private beta on our flagship product and had a small launch event. Unfortunately the venue had a terrible wireless connection and packets were being dropped left right and centre causing havoc with out system, basically it wasn't able to work at all! Luckily we were able to switch to a different network and rescue t...

jQuery nextUntill id < num or alternative

Hi, i'm using jQuery to show/hide different LI-elements based on their classes. Look at this example. <li id="1" class="fp de1"></li> <li id="2" class="fp de1"><button onclick="hide(2,2);"></li> <li id="3" class="fp de2"><button onclick="hide(3,3);"></li> <li id="4" class="fp de3"><button onclick="hide(4,4);"></li> <li id="5" class=...

Manipulate DOM before it is shown to the user?

Hi, I'm not too familiar with javascript, is there a way to manipulate the DOM before the page is displayed to the user? I'm using GWT which makes you create the page elements via javascript. This is kind of convenient, but it appears that all the javascript code is executed after the page is first shown to the user. This has the effec...

How to implement collapsible sections like on this .aspx page?

This .aspx page has a very nice set of collapsible sections with little "+ -" controls. http://www.microsoft.com/sqlserver/2008/en/us/editions-compare.aspx Can anyone tell me how this might be done in Visual Studio? I have tried using firebug to deconstruct the page but can't find the script that is doing the showCollapsibleItem() cal...

Why are custom events not working for me? (Mootools)

I've been learning Mootools, but I'm having problems firing custom events. I'm sure it must be something simple, but I can't see it for the life of me. I wrote a simple class to nudge some list items using Fx.Tween. It works perfectly, except that the custom events aren't being triggered, no matter what I try. <script type="text/javasc...

Create a Dellicious Bookmarklet in Firefox using Delicious API

I want to create a Delicious bookmarklet in Firefox that bookmarks the current page with a predefined tag. For proof of concept, if I enter this url, it works: https://john:[email protected]/v1/posts/add?url=http://www.google.com&amp; description=http://www.google.com&amp;tags=testtag But this as a bookmarklet doesn't, I get ac...

Loading a file from the browser, without a web server

So I need to load a file from disk somehow, and access its contents.. Sort of like how <link rel="stylesheet"> works. Is there a way to do this? XHR requires a web server.. and using something like the above doesn't let me access the contents of the file.. ...

Animate an Image after hovering an item a second

Hey, after some tries to get this to work, i ask you, if you know where my mistake is. This is my code until now: $(".menu a").hover( function () { $(this).data('timeout', setTimeout( function () { $(this).hover(function() { $(this).next("em").animate({opacity: "show", top: "-65"}, "slow"); }, function()...

Could anyone suggest a good RSS feeder?

Well I'm making a site that will function sort of like iGoogle does and I wanted to be able to let the users enter RSS-feeds. What i'm looking for is an RSS-feeder that is as customisable as possible (when it comes to looks) and it should be free since this is just a hobbyproject for now.. :)! Thanks guys ...

jQuery click event not working when mouse moves from one div to another with button held down

I've made a page that uses jQuery to allow you to place <div>s on the page based on your mouse coordinates when you click. The page And here's the javascript: $('document').ready(function() { $("#canvas").click(function(e){ var x = e.pageX - this.offsetLeft; var y = e.pageY - this.offsetTop; $(document.createElement('d...

Replacing certain words with links to definitions using Javascript

I am trying to create a glossary system which will get a list of common words and their definitions via ajax, then replace any occurrence of that word in certain elements (those with the useGlossary class) with a link to the full definition and provide a short definition on mouse hover. The way I am doing it works, but for large pages i...

What is the difference between an object's scope and it's context in javascript?

In the vernacular, scope and context have a lot in common. Which is why I get confused when I read references to both, such as in the quote below from an article on closures: Scope refers to where variables and functions are accessible, and in what context it is being executed. (@robertnyman) As far as I can tell, context is just ...

Is there a way to determine if a <select> dropdown menu is open?

I'm looking for a way to determine if/when a <select> element's menu is open. I don't need to force it to open or close, just figure out if it's open or closed at a given time. I can listen to events for focus/blur, mouseup/mousedown, etc., but I don't think I can reliably figure out the state of the menu from those events. For example,...

JavaScript (SVG drawing): Positioning x amount of points in an area

I'm using http://raphaeljs.com/ to try and draw multiple small circles. The problem I'm having is that the canvas has a fixed width, and if I want to draw, say, 1000 circles, they don't wrap onto a 'new line' (because you have to specify the xy position of each circle). E.g. I want this: ...................................................

Using "Object.create" instead of "new"

Javascript 1.9.3 / ECMAScript 5 introduces Object.create, which Douglas Crockford amongst others has been advocating for a long time. How do I replace new in the code below with Object.create? var UserA = function(nameParam) { this.id = MY_GLOBAL.nextId(); this.name = nameParam; } UserA.prototype.sayHello = function() { cons...

how to capture closing of a browser tab

We would like to throw a specific message before a user closes the browser. Is there a mechanism which will work across all major browsers (like IE, firefox, chrome, opera) ...

javscript smart array loop, need some help here

var _test1 = []; _test1[88] = 'sex'; _test1[1999990] = 'hey'; for(i = 0, length = _test1.length; i < length; i++){ if(_test1[i] == 'hey'){ alert(_test1.length); } } this takes a lot of time, and there are only 2 values. Is there any way to be faster? Or to use another system that index o...

Student's t distribution in JavaScript for Google Spreadsheet

Google Spreadsheets currently does not support the standard function TDIST - i.e. the Student's t-distribution. This function is critical for calculating p-values. It seems that this is related to the fact that no integral-using functions (AFAICT) are implemented either. However, Google Docs allows people to add and publish their own s...

Howto create own Jquery Like Function in Javascript?

How can i create a function which looks like the jquery callback $ Say i want to call a element with id= "mydiv". i want to be able to call it like var div = $("mydiv").value; i think the function should look like function $(element) { return document.getElementById(element); } Is that the right way to do it, or do you prefe...

Overlay an HTML page with an HTML form

Hi folks, this is a question about the best way (or least effort of the best ways) to overlay an html page with a form. Best in this context meaning best user experience whilst meeting the functional requirements. Let's say I have a page with a short form on it; the user has to enter some financial details. To assist the user to enter...