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  • Reliable way to get the "ancestor" of an object with a specific classname, using jQuery

    - by Matt Dawdy
    I've got a javascript function that gets called on change event of a select form element. So, the "this" variable in js refers to the select element. This select element is in a td tag, in a tr tag. The tr tag has a classname of "FilterDetailsRow". Now, I've tested, and if I use this syntax: var filterRow = $(this).parent().parent(); it gets me what I want. However, is there a better way to tell jQuery, "starting with "this" can you please go up my tree of parents until you find one with a classname of "FilterDetailsRow"? Here's what I came up with, but I want to make sure I"m not reinventing the wheel. function GetFilterDetailsRowOfObject(o) { if (o) { if (o.parent()[0].className.indexOf("FilterDetailsRow") != -1) return o; else return GetFilterDetailsRowOfObject(o.parent()); } else { return null; } } Thanks for any advice.

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  • Store JsTree order back into database

    - by Scott
    Hi I am using JsTree and got some of it working with my database. Such as deleting a node, renaming a node, etc. I am having problems with saving the ROOT folders order back to the database. When I move the root folders, it doesnt save order. When I move the sub folders around, it saves order fine. Anyone know what I am doing wrong? I think it's my javascript for the onmove. here's a demo of what I am talking about. http://healthsharing.com/jstree/demo.php

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  • Learning web development as I go

    - by Matt Luongo
    Hey everybody, I've been seriously preparing to take the entrepreneurship leap. I've got a great partner, and we're going to take on some minor funding, and do the thing. Our product is web-based- I'll deem it YAWA (Yet Another Web Application). Both my partner and I have database and web development experience, and I've had a front-end developer in mind for a while. Except, well- he just bowed out. I know a fair amount about the associated technologies (XHTML, CSS, Javascript and some JQuery) interface-side, but I've never had to deal with real-world scenarios, eg cross-browser design. Am I going to be able to survive without this guy? Is it realistic to believe that I can learn the details as I go?

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  • XMLHttpRequest fails in observer method

    - by Michael
    I'm developing a Firefox extension and this code belongs to javascript module. var ajax = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(); ajax.open('GET', "http://www.google.com", true); ajax.onload = function () { Reader.log("Got News"); }; ajax.onerror = function () { Reader.log("Got Error"); }; ajax.send(null); This small code always fails (onerror) if calling from observe method invoked by preference "@mozilla.org/preferences-service;1" Anyone knows how to make this work in observe method?

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  • [Rails 3] Creating helper tag with UJS

    - by Theo B
    Firstly, sorry for my english. I´m brazilian guy that is improving yet. I want create a helper tag called "collection_cascading_select". That helper is similar to "collection_select", but he has one more argument called "source". The "source" is the other collection in the view. Ever that other option is select in the "source", a javascript function needs run to gets his value. Then populate the "collection_cascading_select" collection agreed of that value. That gets confusing ?!? Sorry... But help me! I'm one week in this problem and my brazilian brothers don´t are help me. THANKS!

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  • Where's all the XPCOM user documentation?

    - by Graham Paulson
    Google can't find much user documentation for XPCOM. Sure, it can find endless references to making new XPCOM components in C++, but that's utterly useless to anyone who needs to know how to use the existing components from JavaScript. This is a huge gap, occasionally touched on by trivial examples of creating an instance and calling a method. Has nobody with a more in-depth knowledge of the componentry written anything about its use? Using components with multiple interfaces? Implementing listeners for handling asynchronous behaviour? "Rapid Application Development with Mozilla" is no help (great breadth but little depth). Spotty references that exist to the defunct XULPlanet redirect to Mozilla Development Center, but that's pretty useless. Mozilla Development Center articles point back to XULPlanet, which is a joke. Is this the best an army of open source advocates can muster to promote the extension of The Beast?

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  • How to register data for validation using RegisterForEventValidation in asp.net

    - by rocksolid
    I would like to know the method of using RegisterForEventValidation in asp.net My problem is this. If I enable eventvalidation, then changing the controls using javascript and then posting the information back to the server later on throws up an error. But If I disable event validation, the data present/selected in the controls is not available in the event handlers in code behind. So, how should one resolve such issues? Also, are there are any good articles that explain the issue and a resolution in detail? Tried googling. Came across many articles. But nothing that matched my expectations. Thanks!

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  • Manipulating pixels using only toDataURL

    - by Chris
    The problem I have is this: I need to be able to dynamically tint an image using Javascript, but I cannot access pixel data via the canvas. I can, however, store the dataURL (or any other text-based data format) and include that with the code, manipulate that data, and then create an image object using that dataURL. My question is, how can I access the RGBA value of each pixel, given only the dataURL. I assume I need to decode the base64 url, but into what format in order to manipulate on the pixel level? And then would be it be as trivial as re-encoding it as base64, slapping it in a url, and the passing to an image? Thanks.

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  • Validate Canadian Postal Code Regex

    - by Alex Block
    I have a script written in JavaScript to Validate Canadian Postal Codes using Regex, however it does not seem to be working. Here is the script: If statement: if (myform.zip.value == "" || myform.zip.value == null || myform.zip.value == "Postal Code" || myform.zip.value.length < 12 ) { alert("Please fill in field Postal Code. You should only enter 7 characters"); myform.zip.focus(); return false; } Function: function okNumber(myform) { var regex = /^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$/; if (regex.test(myform.zip.value) == false) { alert("Input Valid Postal Code"); myform.zip.focus(); return false; } return true; }

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  • How can I re-size and re-position a shadowbox/greybox window to display in a certain div element?

    - by kielie
    Hi guys, I would like to know if it is possible to re-size and re-position a greybox or shadowbox window to display in a certain div element? I am creating a template for a wordpress site, and I am using the default calendar, but when you click on a date inside of the calendar, the default action is to open it up in a new window. Would it be possible to mod greybox or shadowbox in such a way that when you click on a date, the box opens up over the calendar displaying the contents in it, instead of a new page? Or is there another way of achieving the desired result, maybe with jQuery or Javascript? Any help would be greatly appreciated, thanx in advance!

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  • Add client-side events to ASP.Net custom control at runtime

    - by nw
    I'm building an ASP.net custom control that implements IScriptControl. I would like other users of my control to be able to assign client-side event handlers to the control. Unfortunately the JS generated by IScriptControl is always injected at the very bottom of the rendered page (see below), so any attempt to assign an event handler in the ASPX page fails because the code executes too early. ... <script type="text/javascript"> //<![CDATA[ Sys.Application.initialize(); Sys.Application.add_init(function() { $create(MyNamespace.MyControl, {}, null, null, $get("my_control_id")); }); //]]> </script> </form> What's the right way to assign an event handler to the instantiated control upon page load?

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  • Cannot select/edit TineMCE-generated table

    - by Rakward
    I'm currently using TinyMCE edit in my drupal-website, problem is that beneath the editor, some of the table is sticking out. If I remove the height set by javascript with firebug, it looks fine, even after resizing. So I want to remove the height with JS, I've put this function at the end of my page: $('table#edit-body_tbl').removeAttr('style'); However nothing happens. I test the function in firebug's console, it works perfectly. Basically, the problem is the JS works, but it wont do anything if I simply load it at the end of the page, even in the document.ready function. The TineMCE script is loaded before my script so I should be able to select/edit/delete elements generated by it no? Does anybody know why or how I can force the page to really load my function in the end(currently it is right in front of the -tag)? Other functions in the script work, except this thing ...

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  • Play sound in mobile browser?

    - by John
    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 works fine in the browser of a normal computer, but it doesn't make a sound on my blackberry. Should I build this stopwatch with Javascript and HTML or should I build it with flash?

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  • how to organize javascripts using rails and jquery

    - by VP
    Hi, i'm working in a big and rich rails web application using tons of javascript. I would like to know if anybody has a tip to organize the javascripts. Today i'm generating a new file named controller.js and adding it to my views using content_for. The problem is, some files are becoming big and sometimes, i need a function from one controller in another, so then in the end, i add a products.js to a details controller just to keep DRY. Is that solution good? Any other tip? I think the same pattern can be applied as well to css files?

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  • Ouput all the page's media queries in a list

    - by alecrust
    Using JavaScript, what would be the best way to output a list containing all media queries that are being applied to the current page. I assume this would need to filtering to find embedded media queries i.e. <link rel="stylesheet" media="only screen and (min-width: 30em)" href="/css/30em.css"> as well as media queries located in CSS files, i.e. @media only screen and (min-width: 320px) {} An example output of what I'm looking for: <p>There are 3 media queries loaded on this page</p> <ol> <li>30em</li> <li>40em</li> <li>960px</li> </ol>

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  • Dojo not working for me.

    - by pfdevil
    Hello, I can't get my dojo working. I've tried everything. Here is the code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/dojo/1.4/dojo/dojo.xd.js"> dojo.addOnLoad(function(){ console.log("page ready, can modify DOM anytime after this"); }); </script> </head> <body> </body> </html>

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  • How Do I Convert text to a WAV file With Inaudible Waveform?

    - by Scott
    I am trying to create an audio watermarking system. I figure the best solution is to create an audio file (WAV) based on a unique string of text and then combine this with the original wav. The part that makes this tricky (for me anyway) is: How do I convert the text string to a wav? How do I ensure that the resulting WAV form is inaudible (or at least barely noticeable to the listener). I would prefer this be done server side (via PHP, etc) but if the processing load isn't too much then would be ok with something in Flash or Javascript. I'd be willing to pay someone to create me a workable solution (complete source code that functions as described). Thanks, Scott!

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  • How to make a link open in tabbed or new window without target attribute?

    - by Alan McCloud
    In my application an external website places link in my web page and the link does not have target=_blank. More specifically its iframe in my webpage whose src is another domain which I have no control. The content in this iframe contains links that opens in the same window wiping off my ajax driven web page and taking the user to the other domain. Is there a way to intercept this ( via javascript? ) and make the link open in another window or browser tab? It would be even much better if the link opens within the same iframe on my webpage. Is this possible? Is target="_self" makes the link open in the same iframe?

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  • Django, CSRF protection and js generated form

    - by Neewok
    I have to create a form dynamically via javascript (yeah, that sounds ugly, but read this for the reason) and wants to make its submission CSRF proof. Usually, I use the @csrf_protect decorator in my views, and the {% csrf_token %} tag in my templates, as recommanded in the doc. But what should I do with a client-side generated form ? If I add a '/get_token/' view to generate a token on the server and obtain its value (say, via JSONP), then that means that I'm creating a backdoor an attacker could use to bypass the protection. Kinda head-scratching. What would you recommand ?

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  • Drop down select to change a second drop down select automatically

    - by zvzej
    I have a webpage where I have a form with several areas to input text and two drop down select options countries is the first one and depending in witch country is chosen the second should display the estates for that country to choose. my page connects to my db from where it gets the countries and estates.... I have a table with the country names and one table for each country estates. so all I'm trying to do is making it change the states to choose from automatically depending witch country got selected with out summiting the form since that enters a new entry to another table in my db. I seen that using javascript is the way to go but can't get it to work in my case since I don't want to be sent to another page or summit the form. here is part of my code any help will be greatly appreciated. Thanks $paissql = "SELECT * FROM Paises_table"; $paisresult = mysql_query($paissql); ?> <script language="text/javascript"> function showMe(str) { <? $estadosql = "SELECT * FROM ".str."_table"; $estadoresult = mysql_query($estadosql); ?> } </script> <TABLE BORDER="2" CELLPADDING="2" CELLSPACING="2" ALIGN="CENTER"> <form action="<?php echo $_SERVER['PHP_SELF']?>" method=POST> <TR><th> id </th> <td><?php echo $row_to_edit['id']?></td> </TR> <TR><th>Nombre:</th><td><input type="TEXT" name=Nombre value="<?php echo $row_to_edit['Id_Nombre']?>" SIZE="100"></td></TR> </td></TR> <TR><th>Pais:</th><td> <select name=Pais onchange="showMe(this.value);" > <? while($rowp = mysql_fetch_array($paisresult)) { $pais = $rowp['Name']; ?> <option value=<?php echo $pais; ?> <?php if($row_to_edit['Pais']==$pais) { echo ' selected="true"';} ?> ><?php echo $pais; ?> </option> <? } ?> </select></td></TR> <TR><th>Estado:</th><td> <select name=Estado > <? while($rowe = mysql_fetch_array($estadoresult)) { $estado = $rowe['Estado']; ?> <option value=<?php echo $estado; ?> <?php if($row_to_edit['Estado']==$estado) { echo ' selected="true"';} ?> ><?php echo $estado; ?></option> <? } ?> <TR><th>Ciudad:</th><td><input type="TEXT" name=Ciudad value="<?php echo $row_to_edit['Ciudad']?>" SIZE="100"></td></TR> <TR><th>Website:</th><td><input type="TEXT" name=website value="<?php echo $row_to_edit['website']?>" SIZE="100"></td></TR> <TR><td> </td> <td> <input type="HIDDEN" name="id" value="<?php echo $edit_id?>"> Para agregar preciona aqui: <input type="SUBMIT" name="ACTION" value="AGREGAR"> </td> </TR> </form> </TABLE> <BR> <BR>

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  • Creating multiple markers in Google Maps using XML

    - by Jessica Stanley
    I'm almost sure this question has been asked before, but for the love of me I just can't find the answer anywhere. Basically what I want to do is create multiple markers on a custom Google Map I'm building. I already have an XML file with the coordinates (lat/lng) and title of each item. I'd like to take the data from the XML file and use it to create markers on the map. I've found how to do this using KML files and MySQL/PHP, but I need to know how to do it in Javascript. One more thing: I have a .xml file of my own, so it won't be like I'll be getting the data from a webpage because I believe (from research I've done today) that the code for that may be different. If anyone knows if this has been posted somewhere else before, could you please direct me there? I've literally been searching all day, this is my last resort. Thanks a ton!!!

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  • Form dependency manager

    - by user225269
    Need help in form dependency manager javascript: As you can see the checkbox below depends on either of the two criteria (the info=student or the info=all). I've come up with the code below based on this: DEPENDS ON name [BEING value] [OR name [BEING value]] CONFLICTS WITH name [BEING value] from this site: http://www.dynamicdrive.com/dynamicindex16/formdependency.htm Here's the code: <tr> <td> <input type="hidden" name="yr"> <label> <input type="checkbox" name="yr" value="year" class="DEPENDS ON info BEING student OR info BEING all"> Year</label> </td> </tr>

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  • IE 8 Caching Problem

    - by Jeff Catania
    One of my javascript sources had an extra comma that was throwing an error in IE8. So I opened up my editor, deleted the comma, and saved. I reloaded IE8, but it was still pulling the old js file. I deleted everything in "Delete Browsing History...", and restarted the browser. It is still pulling the old file. I even set up a log on my server to show whenever the js file was requested. When reloading with IE, the js file is never requested. I tried doing the same process in Chrome and FF, and it pulled the new file and logged properly on the server. Is there some other cache that I am failing to clear in IE that would cause this problem?

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  • Ajax data two-way data binding strategies?

    - by morgancodes
    I'd like to 1) Draw create form fields and populate them with data from javascript objects 2) Update those backing objects whenever the value of the form field changes Number 1 is easy. I have a few js template systems I've been using that work quite nicely. Number 2 may require a bit of thought. A quick google search on "ajax data binding" turned up a few systems which seem basically one-way. They're designed to update a UI based on backing js objects, but don't seem to address the question of how to update those backing objects when changes are made to the UI. Can anyone recommend any libraries which will do this for me? It's something I can write myself without too much trouble, but if this question has already been thought through, I'd rather not duplicate the work.

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  • XMLHttpRequest inside an object: how to keep the reference to "this"

    - by Julien
    I make some Ajax calls from inside a javascript object.: myObject.prototye = { ajax: function() { this.foo = 1; var req = new XMLHttpRequest(); req.open('GET', url, true); req.onreadystatechange = function (aEvt) { if (req.readyState == 4) { if(req.status == 200) { alert(this.foo); // reference to this is lost } } } }; Inside the onreadystatechange function, this does not refer to the main object anymore, so I don't have access to this.foo. Ho can I keep the reference to the main object inside XMLHttpRequest events?

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