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  • when to use "willChangeValueForKey" and "didChangeValueForKey"?

    - by Frost Li
    I saw these lines in a demo project, but I couldn't understand why it did that. [self willChangeValueForKey:@"names"]; [self didChangeValueForKey:@"names"]; It called didChangeValueForKey immediately after willChangeeValueForKey. Does it make any sense? Furthermore, when should be the right time to call this two methods? Thanks a lot!! :)

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  • Open source live message plugin wanted

    - by Bill Li
    I need write a live messenger plugin which periodically read messages from a remote http server, and then change my signature(the short message after my name) accordingly. Can anyone point me to any open source project or materials where I can get started? Thanks.

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  • R: Change the fields' (slots') values of the class assigning a value to some other field

    - by Max Li
    Assgning a value to one field, how can I make the other fields changing. Consider the following R5 class C<-setRefClass("C", fields=list(a="numeric",b="numeric") , methods=list( seta = function(x){ a<<-x b<<-x+10 cat("The change took place!") } ) # end of the methods list ) # end of the class Now create the instance of the class c<-C$new() This command c$seta(10) will result in that c$a is 10 and c$b is 20. So it actually works, however, I want to achieve this result by the command c$a<-10 (i.e. after that I want c$b to be equal to 20 as defined in the class in the logic of seta() function) How can I do it?

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  • Magento - how to create different prices for different sizes of a products?

    - by Lisa Li
    Hi, I am trying to set different prices for different sizes of a few products I have in my store. I am not really sure how to do that propely. The problem is that I already have the regular size defined as a simple product. Now, I want to add a smaller size as well, that can be chosen from the same product page, and I need to set the weight of the smaller size, so postage is calculated properly. Any suggestions? Many thanks!

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  • Array of an array (Database)

    - by Anne Mah Li'en
    I am trying to print out an array of an array from database Below are my codes. I am able to retrieve all the values from the first array. But error occurs when I am trying to retrieve the 2nd array from database. <% ArrayList<Questionnaire> allCategories =QuestionnaireController.getQuestionnaireByCategoryAll(); for(int i=0;i<allCategories.size();i++){ Questionnaire allCategoriesQuestionnaire=allCategories.get(i); out.println("<div class=\"silverheader\">" + "<a href= \"\">" + allCategoriesQuestionnaire.getCategory() + "</a>" + "</div>" + "<div class=\"submenu\">" + "ArrayList<Questionnaire> CategoriesSustainability =QuestionnaireController.getQuestionnaireByCategorySustainability();" + out.println(CategoriesSustainability.get(0).getCategory()); + "<br />" + "</div>"); } %>

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  • How to make a piece of WPF content take up the entire application window

    - by Bojin Li
    I'm working on an application that contains a number of content areas. I want to implement a behavior such that in response to user input, any of these content areas can be toggled to fit the entire application window, and optionally back to its original position again. I experimented with several approaches and none of them seem optimal for me. Here's what I tried to do: Use the ClipToBoundsProperty on the content I want to make "Full Screen": Doesn't work because only the CanvasPanel seems to fully respect this property. The application need to be localized so I would really like to avoid the CanvasPanel. Use a Grid and collapse the other content areas, such that only the one I want to see is visible, hence taking up the entire screen: This will probably work but doesn't seem easy to implement nor maintain. The "Full Screen" content area could be several levels deep, for example residing inside a Tabcontrol, so I would have to hide the tab headers too etc. Reconstruct the content area in a separate view and display it while hiding the rest: Seems easy enough to do with DataTemplates and my ViewModel objects, but any GUI/View only states are not preserved using this approach. Somehow "lift" the GUI/View I want to "Full Screen" into the separate view and display it while hiding the rest: I don't know how to do this or even if this is possible. Anyway if anyone knows a better approach I would love to know about it. Thanks a lot!

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  • Running the script for the 2-nd time, the messages are not retrieved from the mail server

    - by Max Li
    I read the mails from my gmail account with the code following below. import poplib pop_conn = poplib.POP3_SSL('pop.gmail.com') pop_conn.user('user') # result: '+OK send PASS' pop_conn.pass_('password') # result: '+OK Welcome.' print pop_conn.list()[1] pop_conn.quit() It shows me 1 message as expected. However, if I run this script for the second time, I get 0 messages as result. On the server the message is still there and unread. How can I get all the messages also running the script for the second time? For me it behaves as an email client that doesn't download the same mail twice. Is there some flag to force the program to download everything again? I use python 2.7.x on ubuntu 12.10

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  • algorithm to find the three majority elements in an array

    - by Qiang Li
    Let's say there are three elements in a non-sorted array all of which appear more than one-fourth times of the total number of elements. What is the most efficient way to find these elements? Both for non-online and online versions of this question. Thank you! Edit The non-online version I was referring to is: this array is specified in full. The online version means the array elements are coming one at a time. I require the space in addition to time complexity to be tight. disclaimer: THIS IS NOT HOMEWORK! I consider this as research-level question.

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  • PHP, javascript, single quote problems with IE when passing variable from ajax post to javascript fu

    - by Mattis
    Hi! I have been trying to get this to work for a while, and I suspect there's an easy solution that I just can't find. My head feels like jelly and I would really appreciate any help. My main page.php makes a .post() to backend.php and fetches a list of cities which it echoes in the form of: <li onclick="script('$data');">$data</li> The list is fetched and put onto the page via .html(). My problem occurs when $data has a single quote in it. backend.php passes the variable just fine to page.php but when i run html() it throws a javascript error (in IE, not FF obviously); ')' is expected IE parses the single quote and messes up the script()-call. I've been trying to rebuild the echoed string in different ways, escaping the 's on the php side and/or on the javascript side - but in vain. Do I have to review the script in total? page.php $.post("backend.php", {q: ""+str+""}, function(data) { if(data.length >0) { $('#results').html(data); } backend.php while ($row = $q->fetch()) { $city = $row['City']; // $city = addslashes($row['City']); // $city = str_replace("'","&#39;",$row['City']); echo "<li onclick=\"script('$city');\">".$city."</li>"; }

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  • Getting rid of scroll bar for position: absolute inside of position:relative inside of overflow:auto

    - by Marcos
    Hey guys, my first question here on stack overflow. Trying to get something pretty simple to work, I'm sure I'm missing something quite obvious. Still getting used to the "standard" css, too many years working with non-functional ones! Heh. So, sample of what I'm doing: <div style="overflow: auto; border: 1px solid"> hello <div style="position: relative; z-index: 99999; top: 0px; left: 0px;"> <div style="z-index: 99999; overflow-y: hidden; position: absolute; overflow: hidden; height: 200px; left: 0; auto: 0"> <ul> <li >New</li> <li >Old</li> </ul> </div> </div> </div> In essence: The first div is a container, that I would like to automatically overflow as content is added. Inside of that container, I have a popup menu, which I have simplified here. The popup menu appears (as it should) directly under "hello". My problem, however, is that instead of the popup menu "coming out" of the parent, as would be expected by the absolute position, it is actually causing a scrollbar to appear on the parent. I know that if I take otu the "position: relative" it works, but then it no longer appars where I want it (directly under the previous element). What am I missing here? EDIT: Sample here: http://marcos.metx.net/OverflowTest.htm

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  • Jquery – Disable/unbind click on active items, rebind click when inactive

    - by j-man86
    I have a left-positioned navigation that shows/hides content on the right. Currently, when you click a link, it fades in the corresponding content on the right and adds an active class to that link. My problem is that if you click the active link again, the content on the right keeps on fading in again. I would like to unbind that click while the link is active, and if you click on another navigation link (subsequently removing the class from the previous link and adding it to the current one) rebind the click event to all inactive links. Here is my current code: $('.mixesSidebar ul li').click( function() { //Get the attribute id var liId = $(this).attr('id'); //removeClass active from all li's, addClass active to this $('.mixesSidebar ul li').removeClass('active'); $(this).addClass('active'); //Hide all content on the right $('.mixesContent ul').hide(); //Find the content with the same class as the clicked li's ID, and fadeIn $('.mixesContent').find('.' + liId).fadeIn('slow'); }); Thanks so much for your help!

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  • jQuery Autocomplete using extraParams to pass additional GET variables

    - by paperclip
    I am referring specifically to the jQuery Autocomplete v1.1 plugin by Jörn Zaefferer [source: http://bassistance.de/jquery-plugins/jquery-plugin-autocomplete/] as there seems to be quite a few variations of this plugin. I'm trying to pass additional parameters to the server when the user starts typing because I have multiple fields that I want autocomplete to provide suggestions for. In addition to the query, I want to send the input name attribute to the server but I can't seem to use $(this).attr('name') within the extraParams. My jQuery: $('.ajax-auto input').autocomplete('search.php', { extraParams: { search_type: function(){ return $(this).attr('name'); } } }) This is my HTML. <form method="post" action="#" id="update-form" autocomplete="off"> <ol> <li class="ajax-auto"> <label for="form-initials">Initials</label> <input type="text" id="form-initials" name="initials" /> </li> <li class="ajax-auto"> <label for="form-company">Company</label> <input type="text" id="form-company" name="company" /> </li> </ol> </form> Any suggestions?

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  • Need help replicating directory structure with ColdFusion and jsTree

    - by Derek
    I am using this new jQuery plugin called jsTree www.jstree.com and using the HTML datasource. I am also using ColdFusion 7 with cfdirectory and filtering out files, so just dirs. I need to recreate the directory structure in the image, well any dir structure I give it actually. I am having a heck of a time with the logic. variables.imageDirectoriesLen = 8 in this scenario cause I am outputting from the middle of the actual file path, not from begining. Thanks for the help. Derek this is what I have so far <cfoutput query="clientImageDirsFilter"> <cfset nextLen = 0 /> <cfset nextDir = "" /> <cfset nextRowCnt = currentRow+1 /> <cfset nextDir = clientImageDirsFilter.directory[nextRowCnt] & "\" & clientImageDirsFilter.name[nextRowCnt] /> <cfset nextLen = listLen(nextDir, "\") /> <cfset currLen = listLen(clientImageDirsFilter.directory & "\" & clientImageDirsFilter.name,"\") /> <cfif currLen eq nextLen> <li rel="folder" id="node_#randRange(1,99999)#"><a href="##"><ins>&nbsp;</ins>#clientImageDirsFilter.name#</a></li> <cfelseif nextLen lt currLen> <cfif nextLen eq 0> #repeatString("</li></ul>",(currLen-nextLen-variables.imageDirectoriesLen))# </cfif> <cfelse> <ul> <li rel="folder" id="node_#randRange(1,99999)#"><a href="##"><ins>&nbsp;</ins>#clientImageDirsFilter.name#</a> <ul> </cfif>

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  • can't figure out serving static images in django dev environment

    - by photographer
    I've read the article (and few others on the subject), but still can't figure out how to show an image unless a link to a file existing on a web-service is hard-coded into the html template. I've got in urls.py: ... (r'^galleries/(landscapes)/(?P<path>.jpg)$', 'django.views.static.serve', {'document_root': settings.MEDIA_URL}), ... where 'landscapes' is one of the albums I'm trying to show images from. (There are several more of them.) In views.py it calls the template with code like that: ... <li><img src=160.jpg alt='' title='' /></li> ... which resolves the image link in html into: http://127.0.0.1:8000/galleries/landscapes/160.jpg In settings.py I have: MEDIA_ROOT = 'C:/siteURL/galleries/' MEDIA_URL = 'http://some-good-URL/galleries/' In file system there is a file C:/siteURL/galleries/landscapes/160.jpg and I do have the same file at http://some-good-URL/galleries/landscapes/160.jpg No matter what I use in urls.py — MEDIA_ROOT or MEDIA_URL (with expectation to have either local images served or from the web-server) — I get following in the source code in the browser: <li><img src=160.jpg /></li> There is no image shown in the browser. What am I doing wrong?

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  • Mvc2 validation summary and required metadata

    - by Arnis L.
    source code... Thing is, if i specify required metadata using fluent modelmetadata provider like this= public class Foo { public string Bar { get; set; } } public class FooModelMetadataConfiguration : ModelMetadataConfiguration<Foo> { public FooModelMetadataConfiguration() { Configure(x => x.Bar) .Required("lapsa") ; } } And write this into my view = <% Html.BeginForm(); %> <%= Html.ValidationSummary() %> <%= Html.TextBoxFor(x=>x.Bar) %> <% Html.EndForm(); %> And add this to home controller = [HttpPost] public ActionResult Index(Foo foo) { ViewData["Message"] = "Welcome to ASP.NET MVC!"; return View(foo); } It will output this html = <div class="validation-summary-errors"> <ul> <li>lapsa</li> <li>The Bar field is required.</li> </ul> </div> I can't understand why 2nd error is rendered and how to omit it. Author of System.Web.Mvc.Extensibility framework replied with = I think this is a known issue of asp.net mvc, i could not remember the exact location where I have read it, I suggest you post the issue in asp.net mvc issue tracker over codeplex. But before i post anything on issue tracker - i would like to understand first what exactly is wrong. Any help with that?

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  • Problem using setEmptyView on a ListActivity

    - by Pentium10
    I have the following setup, and the empty view text doesn't show up... protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getListView().setEmptyView(findViewById(R.id.empty)); getListView().setTextFilterEnabled(true); setListAdapter(null);// to have empty list } The layout file is: <?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/myScrollLayout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android"> <FrameLayout android:layout_width="fill_parent" android:layout_height="0dip" android:layout_weight="1"> <ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:drawSelectorOnTop="false" /> <!-- Here is the view to show if the list is emtpy --> <ScrollView android:id="@android:id/empty" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/emptyText" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="@string/contact_empty_help" android:textSize="20sp" android:textColor="?android:attr/textColorSecondary" android:paddingLeft="10dip" android:paddingRight="10dip" android:paddingTop="10dip" android:lineSpacingMultiplier="0.92" /> </ScrollView> </FrameLayout> </LinearLayout> String is defined as: <string name="contact_empty_help">"You don't have any contacts to display.\n\nTo add contacts, you have to:\n \n<li><font fgcolor="#ffffffff">Go to <b>Contacts</b></font> application to create new contacts\n</li> \n<li><font fgcolor="#ffffffff"><b>Import from VCF file</b></font>, this is available in Contacts menu, the file most be on the root of the SD card\n</li>" </string> Since the list is empty, it should show me the text defined. I followed the example from the List8 http://developer.android.com/intl/de/resources/samples/ApiDemos/src/com/example/android/apis/view/List8.html http://developer.android.com/intl/de/resources/samples/ApiDemos/res/layout/list_8.xml

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  • Converting John Resig's Templating Engine to work with PHP Templates

    - by Serhiy
    I'm trying to convert the John Resig's new ASP.NET Templating Engine to work with PHP. Essentially what I would like to achieve is the ability to use certain Kohana Views via a JavaScript templating engine, that way I can use the same views for both a standard PHP request and a jQuery AJAX request. I'm starting with the basics and would like to be able to convert http://github.com/nje/jquery-tmpl/blob/master/jquery.tmpl.js To work with php like so... <li><a href="{%= link %}">{%= title %}</a> - {%= description %}</li> <li><a href="<?= $link ?>"><?= $title ?></a> - <?= description ?></li> The RexEx in it is a bit over my head and it's apparently not as easy as changing the %} to ? in lines 148 to 158. Any help would be highly appreciated. I'm also not sure of how to take care of the $ difference that PHP variables have. Thanks, Serhiy

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  • CSS : z-index failed to make popup container ?

    - by justjoe
    i got this css stylesheet code #nav li ul { position: absolute; visibility: hidden; float: none; top: 42px; left: 0px; width: 150px; margin: 0; padding: 5px 10px 6px 10px; z-index: 10000; border: 1px solid #C0ACB2; border-bottom-width: 2px; border-bottom-color: #AF9DA3; border-top: 0; background-color: #fff; opacity: 0.97; } #nav li:hover ul, #nav li.iehover ul { visibility: visible; } i want to make every #nav to be hidden and then displayed when cursor hover around it. But the problem is everytime is show, it's overlapped by other div. it's seem z-index is not working to make the #nav li ul becoming the front container. i'm testing it in firefox and flock.

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  • If statement with code on same block in haml, RoR

    - by Micke
    Hello, i have this Haml view: !!! strict %html{:xmlns => "http://www.w3.org/1999/xhtml"} %head %meta{:content => "text/html; charset=utf-8", "http-equiv" => "Content-Type"} %title Lighty | #{@page_title || "Home"} %body #popup Login here #fade #wrapper #container #header %a#logo{:href => "/"} #menu %ul#main %li#lighty %a{:href => "/"} Lighty %ul %li %a Link here %li#community %a{:href => "/community"} Community #content And i would like to add an if on line #16 to check if it is the currently visited page and add the class "active" to the li if it returns true. How do i write that if statement there and is there any easier way to do this? My plan now is to use a variable like @current_page and testif it @current_page == "community" and add a class if it returns right. Am i thinking wrong? any easier way to accomplish this? Thanks for your answer and sorry for my bad english.

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  • Shopify: Replacing Product Radio Buttons With Dropdown Select

    - by Wade D Ouellet
    Hi, With Shopify I am trying to alter my product template to display a dropdown select list instead of radio buttons for my product variants. I managed to do this but when you try and add a product to the cart from the list it says, "No variant ID was passed." Here is the code for their radio buttons: <ul id="product-variants"> {% for variant in product.variants %} <li> {% if variant.available %} <input type="radio" name="id" value="{{variant.id}}" id="radio_{{variant.id}}" style="vertical-align: middle;" {%if forloop.first%} checked="checked" {%endif%} /> <label for="radio_{{variant.id}}"><span class="sku">{{ variant.sku }}</span> {%if variant.title != 'Default' %}{{ variant.title }} for {%endif%} <span class="price">{{ variant.price | money_with_currency }}</span></label> {% else %} <del style="margin-left: 26px">{{ variant.title }}</del>&nbsp;<span>Sold Out!</span> {% endif %} </li> {% endfor %} </ul> Here is the code for my dropdown select at this point: <select id="product-variants"> {% for variant in product.variants %} <li> {% if variant.available %} <option value="{{variant.id}}" selected="selected"><span class="sku">{{ variant.sku }}</span> {%if variant.title != 'Default' %}{{ variant.title }} for {%endif%} <span class="price">{{ variant.price | money_with_currency }}</span></option> {% else %} <del style="margin-left: 26px">{{ variant.title }}</del>&nbsp;<span>Sold Out!</span> {% endif %} </li> {% endfor %} </select> Thanks, Wade

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  • jquery Ajax sortable list stops being sortable when Ajax call updates the list html

    - by Trevor
    Hi, I am using jquery 1.4.2 and trying to achieve the following: 1 - function call that sends a value to a php page to add/remove an item 2 - returns html list of the items 3 - list should still be sortable 4 - save (serialise list) onclick My full WIP is located here [http://www.chittak.co.uk/test4/index_nw3.php][1] I tried to delegate from the level above the UL but I could get this to work $("#construnctionstage").delegate('ul li', 'click', function(){ The initial list is sortable, when you click add/remove the ajax function returns a new list with the a number of items, BUT I am doing something wrong as the alert message continues to work while the list is no longer sortable. $(document).ready(function(){ $('ul').delegate('li', 'click', function(){ alert('You clicked on an li element!'); /*$("#test-list").sortable({ handle : '.handle', update : function () { var order = $('#test-list').sortable('serialize'); $("#info").load("process-sortable.php?"+order); } });*/ }).sortable({ handle : '.handle', update : function () { var order = $('#test-list').sortable('serialize'); $("#info").load("process-sortable.php?"+order); } }); }); <div id="construnctionstage"> <ul id="test-list"> <li id="listItem_1">

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  • remove a:hover using javascript (not using jquery... don't ask)

    - by Cyprus106
    I thought this would be pretty simple.... Basically, it's a 5-star rating system. When a user clicks, for example, three stars... I want to freeze those three stars right where they're at. I've been trying to simply remove the hover for the a href so it stays what it was at... maybe that's not the right method. I've exhausted absolutely everything I can think of... By the way this is straight javascript, not jquery or anything. It's crazy, I know but all of the JS was written straight.... I've got this class: .star-rating li a{ display:block; width:25px; height: 25px; text-decoration: none; text-indent: -9000px; z-index: 20; position: absolute; padding: 0px; } .star-rating li a:hover{ background: url(images/alt_star.png) left bottom; z-index: 2; left: 0px; } .star-rating a:focus, .star-rating a:active{ border:0; -moz-outline-style: none; outline: none; } .star-rating a.one-star{ left: 0px; } .star-rating a.one-star:hover{ width:25px; } and this code: <ul class='star-rating'> <li><a href="#" onclick="javascript: vote(<?=$id;?>, 1); disableStars(); return false;" title='1 star out of 5' id="1s" class='one-star'>1</a></li>

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  • Having a hard time implementing jquery serialScroll to a website. Need help!

    - by Martin Defatte
    Here's the page I am attempting to implement it on. www.yosoh.com/2010/advertising/beyond/ I have a custom script with figures out the width of all the images, adds it up, then sets the width of that page... I'd like to be able to set the arrows at the top to scroll to the next div (div.portfolioImage). I've followed Ariel Fischer's demo and documentation as best I can... but something keeps escaping me. I've finally gotten some "movement" on page load.. but to tell you the truth, I can't figure out if it's my html structure, css styles, or implementation of serialScroll causing the issue. here's the code for the buttons: <ul id="portfolioNav"> <li><a href="" id="prev">&larr;</a></li> <li><a href="" id="next">&rarr;</a></li> </ul> Here's the script, as it is right now: $('#mainContent').css('overflow', 'hidden'); $('#mainContent').serialScroll({ items:'.portfolioItem', prev:'a#prev', next:'a#next', axis: 'x', duration:1200, force:true, stop:true, lock:false, easing:'easeOutQuart', jump: true });

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  • Loading JSON-encoded AJAX content into jQuery UI tabs

    - by pocketfullofcheese
    We want our of our AJAX calls in our web app to receive JSON-encoded content. In most places this is already done (e.g. in modals) and works fine. However, when using jQueryUI's tabs (http://jqueryui.com/demos/tabs/) and their ajax functionality, only plaintext HTML can be returned (i.e. from the URLs specified in the a tags below). How do I get the tab function to recognize that on each tab's click, it will be receiving JSON-encoded data from the specified URL, and to load in the .content index of that JSON? $(function() { $('div#myTabs').tabs(); }); <div id="mytabs" class="ui-tabs ui-widget ui-widget-content ui-corner-all"> <ul class="ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all"> <li class="ui-state-default ui-corner-top"><a href="/url/one">Tab one</a></li> <li class="ui-state-default ui-corner-top"><a href="/url/two">Tab two</a></li> </ul> </div>

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