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• Implement keyboard control in JavaScript Grid

  - by Vanco

  I finished building a JavaScript grid control, end everything works fine. Paging, button navigation, column sorting, etc. The cells in the grid are DIVs which are generated using Mootools 1.2.4 (which is heavily used throughout the control). I want to implement keyboard control for the grid, both for paging (page up/page down) and for moving with arrow keys inside the rows/cells of the grid. I think that I have to attach an event handler on each cell of the grid and detect what key is being pressed in order to take an appropriate action. But, I can't set the focus on the cells. What am I missing? How do I do this? Any help is appreciated.

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• Why does having a transitional doctype, cause my javascript to fail in WebKit and Opera Browsers

  - by morgenmuffel

  Hi all I am trying to get a mouseover script to work, when there is no doctype set the script works fine in all browsers I test, but the site looks like a dogs breakfast However When i set the doctype to transitional (it has to be this doctype) Firefox and IE8 (&compat mode) work fine But Opera and the webkit browsers can only display the popup above the page fold, so if you scroll down the page and go over an image the popup appears above the visible page. And I can't figure out why, there are a couple of instances of document.all in the code, but my attempts to replace these have broken the code, besides the fact it works in Firefox and not Opera makes me think that document.all is not the issue Any help would be appreciated, even just telling me why a doctype would effect Javascript would be a help. Here is the site without a doctype As I can't post 2 links, being a new user and all, follow the link above and change and change the url from noodle3 to noodle to see the site with a doctype

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• how to stop onChange in javascript

  - by shrimpy

  in one of my selection box, i have a onChange="..." specified... coz i want to change some other form value after any selection changes. however ... in the same page, some wired case i have to manually set the value.. so i have to use some javascript to set the value of the selection combox, but in this case, i don`t want that onChange event to be fired... how can i walk around it??? Forgot to mention that i am actually using dijit.form.comboBox. for normal HTML form comboBox, it won`t cause any issue. Only i use the dijit comboBox, and i try to set the value to some other value, dojo will trigger the onChange.

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• Javascript Hex String to Image

  - by Gunnar Hoffman

  Hello everyone. I'll cut right to the chase. Right now I am developing a web based application. It has a PHP REST based architecture that serves up XML documents. On many of these documents attributes are hex encoded picture strings. On the client side jQuery AJAX fetches an XML document with a picture in it. I need to display said picture in some <img> tags. However my knowledge on such methods is lacking so here I am asking for help. Goal: JavaScript String variable in hex or base64 HTML displayed image. Cross browser is required, or a hack for the ones that do not support it is fine. Thanks, Gunnar

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• Javascript function, on web page close

  - by AXheladini

  Hello there, I have an problem that i can not solve. The problem is this way: When i close my page on some browser i want an message box to appear and to ask me if I really want to close the page or not. logically: click on x (close tab on web browser) and than the box appears with two buttons yes and now, if i click yes the page will be closed if i click no the page will not close. I know there must be some javascript or ajax code but i can not configure it by my self.

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• Get entire text of document as a string using javascript

  - by Tom Dignan

  I am developing a firefox extension and ideally would be able to get the whole darn DOM as a string.. forget any data structure. I just want what I see in "view source" in a buffer. I have been checking out javascript references and HTMLDocument etc. with no avail. Ideally I would be able to write to this buffer as well (seems possible i.e. document.writeLn()) I wish there was a document.read()? Am I just a js noob?

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• Client side javascript, creation of several elements and show each asap

  - by Sirius Lampochkin

  Client side javascript code create some elements (about 50-100) in cycle: for (var i = 0; i < list.Length; i++) { var obj = document.createElement("DIV"); obj.innerHTML = "<span class=\"itemId\">" + list[i].Id + "</span><!-- some more simple code --> "; mainObj.appendChild(obj); } There is some problem with browser rendering, for example IE just freeze until he finished the cycle and then shows all elements in one time. Is there a way to show each created element separately and immediately after "appendChild()"?

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• Running a JavaScript code when a browser bookmark is clicked

  - by Arjun Vasudevan

  I've written a code that has successfully created a bookmark for any of the following browsers - IE, Firefox and Opera. function bookmark() { var title = 'Google'; var url = 'http://google.com'; if (document.all)// Check if the browser is Internet Explorer window.external.AddFavorite(url, title); else if (window.sidebar) //If the given browser is Mozilla Firefox window.sidebar.addPanel(title, url, ""); else if (window.opera && window.print) //If the given browser is Opera { var bookmark_element = document.createElement('a'); bookmark_element.setAttribute('href', url); bookmark_element.setAttribute('title', title); bookmark_element.setAttribute('rel', 'sidebar'); bookmark_element.click(); } } Now I want my bookmark to run a piece of JavaScript code instead of surfing to Google, when the user clicks on it.

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• Call JavaScript function from Silverlight 4.0 application

  - by Raha

  I am trying to call a function from a Silverlight application. It should be a very simple task to do but so far I am not getting the result that I am looking for. This is my Silverlight code: private void button2_Click(object sender, RoutedEventArgs e) { HtmlPage.Window.Invoke("SayHello", new string[] { "Salut!" }); } And this is the JavaScript code : function SayHello(theid) { alert(eval(theid)); var divStatusDiv = document.getElementById("divStatus"); divStatusDiv.style.backgroundColor = "Red"; } The alert message always show "undefined" but when I press "OK" the colour of that DIV gets changed to Red as it should be. Why am I getting "Undefined" all the time ?

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• Javascript: replacing newlines with <br/> working in FF and SAFARI and not working in IE

  - by Daniel

  I was thinking that replacing \n with with javascript was quite a simple task, but it seems not to be so. Posts in Ask Ben or StackOverflow suggest that something as simple as: dst= dst.replace (/\n/g, "<br/>"); $("div.descr").html(dst); will get the job done. Indeed, this work in FF and Safari but not in IE. Text has been created in a textarea and then stored in a database, then retrieved without further processing. It works using FF on windows and Safari on Mac. IE on windows, nada. Is it a major bug in my head? Is it a JQuery issue? Have some idea about how to solve this? And possible reason for? Many thanks

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• Javascript Input type

  - by Phoenix

  Hi All, In javascript we use input type = file .. to open up a file browser pop-up .. is there a way to limit access to folders .. I want to select a folder then ftp all the files in the folder .. so i need access upto only the folder level and not file level .. i guess it would be tedious to go an manually select every file from the folder and then ftp .. is there a way to do that.. Also, how can i set the file-browser pop-up window path to a default one ?

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• Print a JavaScript array to HTML, square brackets and quotation marks intact

  - by Mark Gia Bao Nguyen

  I'd like to set the attribute of an input form with an array of values (to use for autocomplete search). I have a JS array that looks a little something like this: var suggestions = ["value1", "value2", "value3"]; Using jQuery, I did this: $("#search-input").attr("data-source", suggestions); Desired output: <input type='search' data-source='["value1", "value2", "value3"]' /> Actual output: <input type='search' data-source='value1, value2, value3' /> This breaks the autocomplete as it requires an array (or at least something that looks like a JavaScript array).

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• Decent JavaScript IDE

  - by thatismatt

  What is a decent IDE for developing JavaScript, I'll be writing both client side stuff and writing for Rhino. Ideally It needs to run on Mac OSX, although something that runs on Windows too would be nice. ADDITIONAL: Having had a play with both js2 and Aptana, I think I'll be continuing to use Aptana. Mainly because I find emacs a bit hard to get my head round, although I did think that the error hi-lighting in js2 was better than that in Aptana. I'm still looking for a way to visually debug my js code that is running atop Rhino...

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• javascript "this" points to Window object again

  - by terrani

  Hello, I asked a question on http://stackoverflow.com/questions/2719643/javascript-this-points-to-window-object regarding "this" points to Window object. here is source code var archive = function(){} archive.prototype.action = { test: function(callback){ callback(); }, test2: function(){ console.log(this); } } var oArchive = new archive(); oArchive.action.test(oArchive.action.test2); Tim Down wrote "but that function is then called using callback(), which means it is not called as a method and hence this is the global object". What are differences between calling a function by its actual name and callback() as shown on the source code? How does console.log(this) in test2 points to Window when it is inside archive.action???

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• JavaScript - Textarea Selection

  - by brad

  The Problem I am working on an in-browser editor within a textarea. I have started looking for some information on dealing with textarea selection and found this jQuery plugin that does some simple manipulation. However, it doesn't explain what's going on. The Question Where can I find a good resource on Textarea Selection in JavaScript, preferably with a description of both pre-DOM3 and post-DOM30 scenarios? [Edit] In a great answer from Borgar, I have found several different places to start with contentEditable, selectionStart, and selectionEnd. I'll be looking into these things and posting any good tutorials I might find.

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• Compressing plaintext in JavaScript?

  - by AgileMeansDoAsLittleAsPossible

  I have a simple Notepad-like web application I'm making for fun. When you save a document, the contents of a <textarea> are sent to the server via Ajax and persisted in a database. Let's just say for shits and giggles that we need to compress the contents of the <textarea> before sending it because we're on a 2800 baud modem. Are there JavaScript libraries to do this? How well does plain text compress in the first place?

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• Ways to access a JavaScript Object's Property in IE6

  - by aaronrussell

  I have a JavaScript object with some properties. Lets say: var haystack = { foo: {value: "fooooo"}, bar: {value: "baaaaa"} }; Now, I want to access one of those properties, but I don't know which one. Luckily, this variable does: var needle = "foo"; In modern browsers I seem to be able to do the following and it works: haystack[needle].value; # returns "fooooo" But in IE6 it throws a wobbly, haystack[...] is null or not an object. Is there a way to achieve what I'm trying to achieve in IE6? If so, how so?

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• Searching for Nodes with Specific Text using the Prototype Javascript Framework

  - by Alan Storm

  Does the Prototype Javascript library have a selector that's equivalent to jQuery's :contains()? If not, what would what be "The Prototype Way" to selector/filter-down a list of elements that contains a particular string. For example, using the following $$('#some_div dd a') I may get back an array of 50 or so links. I only want the links that contain the work 'home'. In jQuery I'd do this jQuery('#some_div dd a:contains('home')'); Is it possible to do something similar using Prototype? If not, is there an elegant way to filter out the array of 50 elements that gets returned.

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• Cannot call external javascript function from SITE.MASTER

  - by WOPR

  I have a Site.Master in my ASP.NET project which defines a HEAD section as follows <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title id="MasterTitle">MyApp</title> <link rel="icon" href="Content/icon.ico" type="image/x-icon" /> <link href="Content/mycss.css" rel="stylesheet" type="text/css" /> <script src="Content/mycode.js" type="text/javascript"></script> </head> In the mycode.js file, I have a function called GetSels(); function GetSels() { //do stuff } If the GetSels function is defined in Site.Master, GetSels is callable. If it's in mycode.js, it's not. Every code example I've see seems to says this should work. What am I doing wrong?

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• execute javascript method after method excution complete ?

  - by James123

  I want execute below callback()method after completion of process document.getElementById('btnDownload').click(); method. click() is the code behind method. That means, I mean after complete process of click() then excute callback() method. Because my modelpop is not hiding in code behind. So I want hide in javascript method. function LoadPopup() { // find the popup behavior this._popup = $find('mdlPopup'); // show the popup this._popup.show(); // synchronously run the server side validation ... document.getElementById('btnDownload').click(); callback(); } function callback() { this._popup = $find('mdlPopup'); // hide the popup this._popup.hide(); alert("hi"); }

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• Tabbed javascript widget for a Rails app

  - by neilc

  A user registers on our Rails app and they're given javascript to embed a widget in their website. The widget has a tabbed interface, like the JQuery tabs http://stilbuero.de/jquery/tabs_3/. iFrames have been tested, but the widget form factor and cross-domain policy negates the use of iframes. The widget is very dynamic and will often update the DOM with new content - and because of cross-domain policy, it looks as though JSONP is necessary. I understand that 'widget.js.erb' needs to create the widget layout, reference a stylesheet, render the tabs, etc - but once a tab is clicked, how does the widget request the content from the Rails app and render it in the DOM?

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• Javascript Regular expression to enforce 2 digits after decimal points

  - by Manas Saha

  I need to validate a text box where users are supposed to enter numeric values with 2 decimal places. I am validating the text in client side javascript. The validation will pass only if the number has precisely 2 decimal places, and there is at least 1 digit before the decimal point. (could be zero) the number before the decimal point can be 0, but can not be multiple zeroes. like 00 or 000 The number before the decimal point can not begin with more than 1 zero. Example of Passed validation: 0.01 0.12 111.23 1234.56 012345.67 123.00 0.00 Example of failed validation .12 1.1 0.0 00.00 1234. 1234.567 1234 00123.45 abcd.12 12a4.56 1234.5A I have tried with [0-9][.][0-9][0-9]$ But it is allowing alphabets before decimal point. like 12a4.56 Can anyone please fix the expression? thanks a lot in advance.

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• Strophe javascript prevent disconnection on some delay

  - by patrikas

  Hello, I am developing javascript XMPP application which uses Strophe library to connect to Jabber server. I need to engage the thread for about 5-10 seconds when Strophe connects to the server. Thread is engaged by running java applet and after it releases the thread it goes back to handle XMPP events, however at the moment I cannot manage to do that - trying to use a connection after delay gives me 404 HTTP error (this is sent by XMPP-BOSHS service straight after Strophe sends POST request with XMPP message to it). I was trying to 'pause' a connection with Strophe's connection.pause and then resume it - didn't work. Would sending some raw content to the server, maybe if it's possible telling it that client's gonna be unresponsive for a short time work ? Are there any other solutions ? Thanks

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• Arrays in JavaScript

  - by caramel1991

  While reading a book about JavaScript I stumbled across an example: var names = new Array("Paul","Catherine","Steve"); var ages = new Array(31,29,34); var concatArray; concatArray = names.concat(ages); My question is, why doesn't the variable concatArray need to be define as a new Array() in order to store the concatenated data for both arrays name and ages , but when I try to treat the concatArray as an array by adding another line of code "document.write(concatArray[0])", it works just like an array and shows me the data stored in the first element. I just wonder why I'm not declaring the concatArray as a new array, yet it still works as one.

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• jQuery compatible JavaScript documentation generator

  - by clyfe

  I need to choose a documentation generator (similar to jdoc in java or rdoc in ruby) for my javascript project that (built with jquery, underscore and backbone) Candidates: jsdoc toolkit pdoc natural docs docco YUI doc doctool http://jquery.bassistance.de/docTool/docTool.html other ? Requirements should work with jquery, underscore and backbone. that means object-literal methods etc I really like pdoc but its too centered around prototype, poorly documented, and I don't want to make extra files (sections?) to make it work (not sure about this) docco is nice but I want structured output (as in menu + class/func structure like jdoc) must be command line/makefile compatible (not web pastie) Tips, tricks, tutorials, success stories, advice greatly welcomed. Why Doesn't jQuery use JSDoc?

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