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• Django: How do I go about changing my simple app to use Ajax?

  - by swisstony

  I currently have a web page where the user enters some data and then clicks a submit button. I process the data in views.py and then use the same Django template to return and display the original data and the results. What I would like to do is try to give it a bit more of a modern look and feel. You know the sort of thing, the page doesn't refresh but displays a spinning disk until the results are displayed. I assume this means using Ajax? How difficult is it to modify a simple app like this to use Ajax? What is involved? What are the best tools to use? JQuery?

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• Escaping and unescaping a string with single and double quotes in Javascript

  - by Reina

  I have a search box that a user can search for any string including single AND double quotes, once they have searched, the backend is passing the keyword back to me so I can put it back in the box. I don't know what the string is so I can't escape quotes myself, below is an example: var keyword = "hello"; $("#selectionkeywords").val(); The issue I am having is that if the user enters "hello" the keyword becomes ""hello"" and I get this error: missing ) after argument list [Break On This Error] jQuery("#selectionkeywords").val(""hello""); The user could also enter single quotes so that rules it out as well. I tried using escape unescape but I still have the same issue e.g. escape(""hello"") I could get the value in an unescaped format e.g. "hello" but I don't know what to do with it, escape doesn't work on it I end up with this %26%23034%3Bhello%26%23034%3B So I'm pretty much stuck at the moment as I can't do anything to the string, any ideas?

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• Backbone.js routing without changing url

  - by louism

  I am migrating a single-page web application based on Backbone.js and jQuery to a Chrome extension. However, neither the pushState nor the hashbang-based router modes seem to play well with the environment within the extension. I've come to the conclusion that I'm better off just directly rendering views on user interactions, bypassing the window.location system altogether. However, I'm not too sure how to implement this without changing calls to Router.navigate in dozens of files. Is there a pluggable/modular way to keep the Backbone routing system but bypass any changes to the url?

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• JS Variable inside another variable

  - by Tusk

  I have a function that would use other variables, depending on what has been passed. Like this = ActionBar(slot) slot contains "one". and I would like to create a call inside that like object.slot.name but it should convert it before hand to make the command look like object.one.name. Is there a way to do this in javascript/jquery? I remember vaguely that some other language does this as {slot} or something like that. Sorry if this question was already asked, I've checked google and stackoverflow too, but didn't find an answer. Also I'd like to know what's the proper programming term for this kind of variable passing? Edited it cause of misunderstandings. I'm looking into OOP js, so object is an object, one is an object, and name is an attribute, but when passing I'm passing "one" as a string to the function. Tried eval, it doesn't work while dotted with an object.

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• Dragged div change places with destination

  - by Cudos

  Hi. Maybe a bit complex to explain. I have a grid with 9 images 100 x 100 px like this (each number symbolize a picture): 1 2 3 4 5 6 7 8 9 What I want is that the user can drag and drop e.g. 9 over 1 and they change places like this: 9 2 3 4 5 6 7 8 1 Sortables from jquery UI will not work since their solution is using floats. That will "push" all the boxes to the right or left e.g.: 9 1 2 3 4 5 6 7 8 thanks in advance.

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• Javascript - remove part of cookie with a split('|') like array

  - by MgS

  I'm abit stuck. I'm using jQuery. I have a cookie which has the value such as : 1,something|2,somethingg|1,something We are treating it as [0] as id and [1] as name. I need to remove ONE where the id == '1' for example, this will leave the cookie like this: 1,something|2,somethingg How do I go about this, it will probally be in a loop, but not sure how to remove one of them. I have this so far: function removeItem(id){ var cookieName = 'myCookie'; var cookie = $.cookie(cookieName); if(cookie){ var cookie = cookie.split('|'); $(cookie).each(function(index){ var thisCookieData = this.split(','); if(thisCookieData[0] == id ){ } }); }

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• How can I close a SimpleModal dialog when the user clicks the Back button?

  - by Wally Hartshorn

  When a user clicks on a button or link, I use the SimpleModal jQuery plugin to display a dialog to overlay the entire page, preventing the user from clicking another button or link during the delay before the next page loads. (I'd like to avoid this, but that's an issue for another day.) After the next page displays, if the user clicks the Back button, the previous page still has the SimpleModal overlay displayed, preventing them from using the page. This is a problem. How can I cause the SimpleModal dialog to close automatically either when the leaves the page or when the user clicks the Back button to return to the page? I tried this without success: $("body").unload(function() { $.modal.close(); }); Thanks! Wally

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• how to hightlight a div if the page.isvalid=false.

  - by Nimesh

  I wanna high light particular div when the page.isvalid=false. on the pageload i am able to get display the error message. But the issue is that i am not able to highlight the control which is required. I have a js function which sets the error class to the div. Its working fine when i click on a button. On the page load i wanna set this as well. can i do this using some jquery??? or something other way.. Please let me know how to do this.... share your ideas.... Thanks

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• Returning the html from .ajax call

  - by coffeeaddict

  I'm getting undefined for some reason when I try to return the html via the callback function: function getDataFromUrl(urlWithContent) { // jQuery async request $.ajax( { url: urlWithContent, dataType: "html", success: function(data) { return $('.result').html(data); }, error: function(e) { alert('Error: ' + e); } }); } I know I'm getting data back, I see it in firebug in the response and also when I alert out the data, I see the entire page content come up in the alert box. When I call my function, I am doing the following: var divContent = getDataFromUrl(dialogDiv.attr("href")); if(divContent) dialogDiv.innerHTML = divContent; when I alert out the divContent (before the if statement) I'm getting undefined. Maybe I'm just going about this wrong on how I'm returning back the data? I also tried just return data; same thing, I get undefined after the call to this method when set to my variable.

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• How can I implement lazy loading on a page with 500+ images?

  - by Fedor

  I basically have a booking engine unit results page which must show 40 units and per each unit there's 1 large image of the first thumbnail and an X number of accompanying thumbnail images. I've been using the jquery lazy load plugin, but it's not thorough enough ( I'm invoking it on DOM Ready ), plus it doesn't really work in IE ( 50% of the clients use IE so it's a big issue ). What I think I really need to do is not really spit out the image but a fake element such as a span, and possibly modify my code such that if the user views the span, render it into an image element. <span src="/images/foo.gif"> The booking engine relies on JS so I think I might be forced to just rely on ajaxifying all the thumbnails and have event handlers on window scroll, etc in order for the page to be "usable" and load at an average time ( 2-3 seconds instead of 5-30s on high speed DSL/Cable ). I'd appreciate any examples or ideas.

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• window.onfocus and window.onblur not working in IE8

  - by AshokD

  Both the events are getting fired at the time onblur event. <script src="js/jquery-1.7.2.js" type="text/javascript"></script> <script language="javascript" type="text/javascript"> window.onfocus = function() { $('#msg').html($('#msg').html() + '<br/> focus'); }; window.onblur = function() { $('#msg').html($('#msg').html() + '<br/> Blur'); }; </script> <div id="msg"> </div>

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• failed to load resource

  - by Jason94

  Im trying to set up a simple mp3 player: <script language="javascript"> $(document).ready(function() { $('a.media').media( { width: 300, height: 20 } ); }); </script> and then <a class="media" href="piano.mp3">piano</a> But i get the following error: Failed to load resource I have followed the tutorial at http://jquery.malsup.com/media/audio.html, and if i click to view source and clikc on piano.mp3 chrome opens up its built in media player and plays the song, so the link and location is correct... Anyone got a clue?

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• How to use this piece of code in a function

  - by oliverbj

  I have this jQuery code: var vis = (function(){ var stateKey, eventKey, keys = { hidden: "visibilitychange", webkitHidden: "webkitvisibilitychange", mozHidden: "mozvisibilitychange", msHidden: "msvisibilitychange" }; for (stateKey in keys) { if (stateKey in document) { eventKey = keys[stateKey]; break; } } return function(c) { if (c) document.addEventListener(eventKey, c); return !document[stateKey]; } })(); vis(function(){ document.title = vis() ? 'Visible' : 'Not visible'; }); What it does now is to change the document title of the page. If the page is not visible, it will be changed to that and vise verca. My question is, how can I use this function like this: if page is visible{ //do something } if page is not visible{ //do something else }

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• Attaching a function to the parent window from an iframe and getting proper scope

  - by Ronald

  I working on adding file uploading to my web application. I'm using an iframe to post my upload. When my php script processes the upload it writes some JavaScript to the iframe. This JavaScript is attempting to attach a function to the parent, this works, but when this function actually gets called it doesn't have the correct scope. Here is the code I'm attaching to the parent window: parent.window.showPreview = function(coords) { if (parseInt(coords.w) > 0) { var rx = 200 / coords.w; var ry = 250 / coords.h; $('#preview').css({ width: Math.round(rx * 400) + 'px', height: Math.round(ry * 533) + 'px', marginLeft: '-' + Math.round(rx * coords.x) + 'px', marginTop: '-' + Math.round(ry * coords.y) + 'px' }); } } When this function gets executed I get an error that says $ is not defined. I've tried adding changing the JQuery call to parent.$('#preview').css..., but then it says that parent is undefined. Any ideas?

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• Replace the surround of an html element with another document

  - by KvanteTore

  I have an html page with (among other things) a Unity3D window. I would like to replace everything on the page without causing the Unity window to reload. I have tried the following jquery-tastic function replaceSurround(keepElem, newElem) { keepElem.siblings().remove(); keepElem.prepend(newElem.prevAll()); keepElem.append(newElem.nextAll()); var keepParent = keepElem.parent(); var newParent = newElem.parent(); if (keepParent && newParent) { replaceSurround(keepParent, newParent); } } where keepElem is an element in the original document and newElem is the corresponding element in the new document, but it did not work very well.

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• how to manipulate Json response like an object?

  - by loviji

  Hello, my jQuery.ajax return JSon object. I firstly read other articles. but their response text not likes mine. My Response content: from firebug response {"item":"[{\"country\":\"USA\",\"lan\":\"EN\"},{\"country\":\"Turkiye\",\"lan\":\"TR\"}]"} Now i trying to alert countryName: $('#loadData').click(function() { $.ajax({ type: "POST", url: "WS/myWS.asmx/getDaa", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { $("#jsonResponse").html(msg); $.each(msg.item, function(i, d) { alert(this.country); debugger; }); }, }); }); but it is alerting "undefined"

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• Finding out event that called a CGI script

  - by Acorn

  What I want is to be able to make my CGI script do different things depending on what action initiated the calling of the script. For example, if one button is pressed, a database is cleared. If another button is pressed, a form is submitted and that data is added to the database. Should I be doing something like adding the name of the form/button to the end of the POST data submitted in jQuery and then .poping it off in the script? Or is there some other data that's already sent in the POST that I could get from FieldStorage that would give me the information I need to decide what the script should do when it's called? And what if I wasn't using javascript? Would I have to have a hidden field that gets submitted with the name of the form/button? Or is it best to use a different target script for each button on a page?

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• AJAX form sections - how to pass url of next stage of form

  - by dan727

  Hi, I've got a multi-part form (in a PHP MVC setup) which I have working correctly without javascript enhancement. I'm starting to add the AJAX form handling code which will handle each stage of a form submission, validating/saving data etc, before using AJAX to load the next stage of the form. I'm wondering how best to pass the URL of the next stage to the current form being processed, so that my jQuery form handling code can process the current form, then load the next part via AJAX. The form "action" is different from what the url of the next stage of the form is - what do you think would be good practice here? I was thinking about either appending the url of the next stage to the form action url, via a query string - then just use javascript to extract this url when the form is successfully processed. The other option is via a hidden form element. Not sure what other client side options I have here Any thoughts?

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• integrate / build 'weather radar' widget

  - by zack

  I'm looking to integrate a 'weather radar' widget into a site I'm building. The only available resource I can find is: http://www.meteoonline.co.uk/gadgets/Europe/Netherlands/135 which basically delivers a flash mov in a iframe ! urrrgh! - and 'permission denied' of course with any javascript interaction on the iframe.. Can anyone suggest an alternative resource / or approach ? I'm happy to work with the raw data if I can get it .. any ideas welcome ! site is like [ html5 + jquery on django ]

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• in jqgrid, how can i have the editform disappear after submit

  - by leora

  right now, when i click submit it sends a message to the server and updates the databased and refreshes the screen but it keeps the edit form popup on the screen. Is there anyway to have it disappear once the submit is complete. its kind of annoying because its a little unclear that you are done because the form just sits there (even through the grid has refreshed) i have closeAfterEdit and closeAfterAdd set to true but it doesn't seem to do anything. jQuery("#grid").navGrid("#pager", { }, { height: 380, width: 500, reloadAfterSubmit: true, closeAfterEdit: true, url: siteRoot + controller + "/Update" }, { height: 380, width: 500, reloadAfterSubmit: true, closeAfterAdd: true, url: siteRoot + controller + "/Add" }, { reloadAfterSubmit: true, url: siteRoot + controller + "/Delete" }, { multipleSearch: true }

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• Highlight changes?

  - by Nimbuz

  HTML: <html> <body> <textarea>Original Text</textarea> <button>Replace</button> </body> </html>?????????????????????????????????????????????????????????????????????? jQuery: $(function() { $('button').click(function () { $('body').html($('body').html().replace('Original','New')); }); }); ? http://jsfiddle.net/r7MgY/ Can I highlight changes somehow with a fading yellow background maybe? Thanks

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• Checkout Control Panel that updates pricing???

  - by Stefan

  Hello all, my first post here. I am not much of a programmer, I can tailor some things for my personal needs but thats about it. I am looking for a script (jQuery preferred I suppose) which is easy to incorporate and bind to a few DIVs to be updated dynamically. Nothing too deep, just something that can updated price at check-out... Could I get some recommendations on a solid and simple widget for this? I appreciate any help/suggestions!

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• Form action with #hashtag not working in internet explorer

  - by Stephane

  I am using jquery-ui tabs and I've set it up to select the correct tab depending on the #hash from the requested URL. I have a form which performs a search, and each tab present the result from different providers. so if the form is submitting to the action "/myAction#tab1", when the results load, the corresponding tab gets selected. This works perfectly in every browser except for IE. When my form is submitted, it loses somehow the #hash which describes which tab to select. Is that yet another a bug from IE, or am I doing something wrong? I could not find much information about this, but I can hardly believe that this is not a common problem.

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• live click event of an image is not supported in ie6

  - by Mohan Ram

  I am retriving this content from ajax <div id="content"> click on image to close<img id="img_id"> </div> jQuery code to close div: $("#img_id").live('click',function(){ $("#content").slideUp('fast'); }); Once I click on image div closes. But in IE6 nothing happens. I don't know why IE6 doesn't take live click event, or if the problem is with image id. Once image clicked (live click event not triggered in IE6) What would be the reason?

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• grayscaling images and refering the original image back.

  - by dilip

  I know how to grayscale an image. I am using jquery accordion and I have images on every accordion header. I want to change the image to grayscale when the accordion is active and change the image back to its original form when the accordion is not active. I am using the event accordionChange. The problem is that I am not able to save the original image. Please help. Also after grayscaling I tried to give the original src directly as document.getElementById("imgId").src = "images/pic.jpg"; This is not working.

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