javascript

Are there any (somewhat) advanced mathematics Javascript libraries?

Are there any libraries knocking around that provide any additional general purpose math functions for Javascript? Say things like sums over a range, derivatives, integrals, etc. I can imagine that many things aren't possible, so even libraries that do rough approximations would be interesting. Thanks! Update: As mentioned below, I gue...

Inserting a Variable String into the javascript prototype expression

Dear experts, Pardon me for giving you a confusing title on this problem. I'm really confused and i don't know how to put it in other words. So here is what I what to accomplish. I am making a Custom Javascript Object to store data. I have automated this process and inserted each instance of the object into an array. I am making a ...

Remove favicon using javascript in Google Chrome

How can you remove the favicon using Javascript in google chrome? The goal is to return it to the browser default, which is in this case a blank image. I found this question, but it doesn't work if you leave the link.href attribute as empty. Even if the favicon is set because there is a favicon.ico file on the server, I'd like to remov...

Windows desktop gadget RSS Feed colour coding items

I have a desktop gadget that pulls RSS Feeds from a website. The Feed contains information about issues - ie. Priority, Time, Description. The Feed items are displayed on the desktop - however I need to colour code them according to their priority ie 1 = red etc. using the substr function - is there a better way to do this using JavaScr...

Play sound in mobile browser?

I want to make myself a web based stop watch for training that I can use on my Blackberry mobile browser. The stopwatch should count 3 minutes, then ring a bell, wait 1 minute, then ring another bell and then repeat. My problem is I can't seem to get sound to work on my blackberry browser. I tried using <embed src="bell.wav"> which wo...

SyntaxError: Parse Error only happens in safari

Im getting SyntaxError: Parse Error, only on safari. Here is the code in question. <script type="text/javascript"> $(document).ready(function() { $("form").transload({ auth: {key: "b7deac9c96af6c745e914e25d0350baa"}, flow: { encode: { "use": ":original", "robot": "/video/e...

jquery element not defined, but it used to skip it...

I recently transferred a site to a new host. Reloaded everything, and the javascript that worked fine before is breaking at an element it can't find. $('#emailForm') is not defined. Now, the #emailform isn't on the page, but it wasn't before either, and JS used to skip this and it would just work. Not sure why this is happening. Any cl...

How can I get jQuery UI's Draggable and Sortable functions to work on the iPhone?

I have a page that uses JQuery UI; in particular the Sortable interaction. The page works fine for desktop web browsers with mice, however I can't get the drag-drop functionality to work on Mobile Safari on the iPhone. Any dragging action simply scrolls the page. The functionality on my page is extremely similar to the Sortable Empty-...

Ajax loaded content , jquery plugins not working

Hello, I have a link that calls the ajax to load content, and after the content is loaded, my jquery function doesn't work anymore Here is my HTML <a href="#" onclick="javascript:makeRequest('content.html','');">Load Content</a> <span id="result"> <table id="myTable" valign="top" class="tablesorter"> <thead> <...

IE7 is making my life miserable! Getting gaps between html table columns (w/ colspan) with css toggle

Copy/paste this html code snippet and try it out in IE7. When you toggle the hidden columns it leaves a gap between the columns. In Firefox it works fine, the columns touch when minimized. Haven't tried IE8 yet, would be curious to hear how it works there. Any ideas? I've tried a bunch of things in the CSS like table-layout:fixed bu...

ASP.NET validators error message in client-side JavaScript

Hello, The error message that gets added to the validation summary when the form is invalid I need to get access to in client-side JavaScript. How do you access the actual message? My page doesn't have a ValidationSummary present, and Page_Validators[0].errormessage is *. Where is the message? Thanks. ...

how to run href="#var=something" before onclick function fires in javascript?

i'm using the below javascript to change an image on an aspx in asp.net c# <script language="JavaScript" type="text/javascript"> var updateImageWhenHashChanges = function() { theImage = document.getElementById("ctl00_ContentPlaceHolder1_Image1a"); if(window.location.hash == "#size=2") ...

How to hide items under the options from one select box upon selection of an item in another select box?

Hi, I am new to jQuery and would like to know how is it possible for me to hide an option in a selection box based on the selection of another selection box. I have 5 selection boxes, this is for the administrator to select the users of a limited criteria. The <options> are create dynamically from the results of a database query and ph...

are there any negative implications of sourcing a javascript file that does not actually exist?

If you do script src="/path/to/nonexistent/file.js" in an HTML file and call that in a browser, and there are no dependencies or resources anywhere else in the HTML file that expect the file or code therein to actually exist, is there anything inherently bad-practice about doing this? Yes, it is an odd question. The rationale is the dev...

load qUnit asyncronously

I am trying to load QUnit in js but the addevent function in QUnit.js is never fired, and it's just not working: var appendQUnit = document.createElement('script'); appendQUnit.src = 'js/utility/qunit/qunit.js'; appendQUnit.type = 'text/javascript'; document.getElementsByTagName('head')[0].appendChild(appendQUnit); ...

Finding parent class and id

Well after countless tries i can't get this work? <script type="text/javascript"> $("td input").focusout(function() { var column = $(this).parent('td').attr('class'); var row = $(this).parent('tr').attr('id'); $('#dat').HTML(row+" "+column); }); </script> And the html looks like this <tr class="numbers" id=...

How can I make my counter look less fake?

I'm using this bit of code to display the number of users on a site. My customer is complaining it looks fake. Any suggestions? var visitors = 187584; var updateVisitors = function() { visitors++; var vs = visitors.toString(), i = Math.floor(vs.length / 3), l = ...

Can't access form elements

Hi, my problem is that my variables are not working in javascript. all variables need names without some character at the beginning, this is the stupid thing...Anyways, im trying to make a funtion that makes "select all checkboxes". It is not working so i looked at the page source/info and found out that the variables were not changing. ...

Javascript: How to calculate the exact position of the viewport?

My problem is I need to get the position of the viewport relative to the extent of the entire document. I am only concerned with Firefox. My issue is that everything I have read says that: viewport height is window.innerHeight scroll position is window.pageYOffset document total height is document.height So, I would expect that if ...

Capture form fields and repopulate the form with them

I am currently testing a large web form and would like to be able to easily populate the form with several different lots of test data without having to type them each time. Is there a generic way to capture form inputs on a web page and have them repopulated on a different page load? I thought a tool like greasemonkey might be able to...