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  • JavaScript/jQuery: Follow path over page

    - by Echilon
    I need to make an animated gif 'fly over a page and follow a path. I'm thinking of using jQuery but would I be right in thinking the only way to do it is manually calculating the percentage of width/height where the shape layer should be placed, then using absolute positioning is the only way to do this? I know there are some amazing jQuery plugins available for this type of thing.

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  • jquery/javascript: accessing contents of an iframe

    - by rz
    I would like to manipulate the html inside an iframe using jquery. I thought I'd be able to do this by setting the context of the jQuery function to be the document of the iframe, something like: $(function(){//document ready $('some selector', frames['nameOfMyIframe'].document).doStuff() }); However this doesn't seem to work. A bit of inspection shows me that the variables in frames['nameOfMyIframe'] are undefined unless I wait a while for the iframe to load. However, when the iframe loads the variables are unaccessible (I get permission denied type errors). Does anyone know of way to work around this?

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  • Reference Object calling function in Javascript

    - by Louis
    I have a makeshift events system in JS and the attacher looks like this: events.attach(events.NEW_TASK,this.update); Where this.update is a callback/handler/function. The problem is, when the dispatcher tries to call this handler, it loses it's original context. How can I bind the handler with the context of the object that calls the attach function without passing this as an argument and using that?

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  • How to remove an element from opener window viewsource using javascript

    - by spj
    Hi Step 1 I've two screens one is parent and the other one is child. On click of a button in the parent window the child popup will open. Step 2 On click of a button in child i'm displaying the html(viewsource) of parent window in a textbox(.net) and holding in a hidden variable hdnSource too. Step 3 I've 4 checkboxes in the child window. If the checkbox is not checked, then that part of html should be removed. eg: cbxPersonal, cbxProfessional if cbxProfessional is unchecked I should remove divProfessional from html which is in hdnSource and display in the textbox Can anyone help me to do the 3rd part of coding. Since the html is in the variable, I'm not able to find the div with document.getElementById

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  • Javascript Closures, Callbacks, This and That

    - by nazbot
    I am having some trouble getting a callback function to work. Here is my code: SomeObject.prototype.refreshData = function() { var read_obj = new SomeAjaxCall("read_some_data", { }, this.readSuccess, this.readFail); } SomeObject.prototype.readSuccess = function(response) { this.data = response; this.someList = []; for (var i = 0; i < this.data.length; i++) { var systemData = this.data[i]; var system = new SomeSystem(systemData); this.someList.push(system); } this.refreshList(); } Basically SomeAjaxCall is making an ajax request for data. If it works we use the callback 'this.readSuccess' and if it fails 'this.readFail'. I have figured out that 'this' in the SomeObject.readSuccess is the global this (aka the window object) because my callbacks are being called as functions and not member methods. My understanding is that I need to use closures to keep the 'this' around, however, I have not been able to get this to work. If someone is able show me what I should be doing I would appreciate it greatly. I am still wrapping my head around how closures work and specifically how they would work in this situation. Thanks!

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  • jKey (JavaScript key shortcut plugin) Issue

    - by Oscar Godson
    Me and a friend are writing a plugin for jQuery that makes it easy for devs to add key shortcuts and we're damn close but no cigar. We're having issues with the key combos. It seems like we are having issues when you call the same selector multiple times on a page. Try pressing alt+a... youll see it works one time, then gets all mangled up. Anyone know how to fix it? It'll be on github after it's corrected and I'd be happy to add "thank you to" link to whoever can fix this in the header with the copyright info :) It's nicely documented and i have all the code and stuff here. So... anyone? http://jsbin.com/azaha4

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  • Javascript IN operator compatibility

    - by jAndy
    Hi Folks, Can someone tell me since which ECMA version the IN operator is available and which browsers (versions) support it ? Explanation: The IN-operator can be used like the following: var myObject = { Firstname: 'Foo', Lastname: 'Bar' }; if('Lastname' in myObject){ // Lastname is an attribute of myObject }

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  • Architecture of a single-page JavaScript web application?

    - by fig-gnuton
    How should a complex single-page JS web application be structured on the client-side? Specifically I'm curious about how to cleanly structure the application in terms of its model objects, UI components, any controllers, and objects handling server persistence. MVC seemed like a fit at first. But with UI components nested at various depths (each with their own way of acting on/reacting to model data, and each generating events which they themselves may or may not handle directly), it doesn't seem like MVC can be cleanly applied. (But please correct me if that's not the case.) -- (This question resulted in two suggestions of using ajax, which is obviously needed for anything other than the most trivial one-page app.)

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  • Javascript "inlet" or "offset" function for drop-list options

    - by Camran
    I have seen on several sites that drop list values can have offsets... For example this drop-list: Fruits Apple Banana Orange Colors Red White Black The above are all options, but some have "inlets" or "offsets" or whatever you want to call it. How is this done with js? (regular js, not jquery at the moment) Thanks If you need more input let me know.

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  • help, stuck with logic variable comparison loop, javascript

    - by Jamex
    I have an input text box for search of input, the id of the text box is: id="search". if a user enters 'cat' at first and hit search. In the function, I get the value 'cat' by using the syntax: var input = document.getElementById("search").value; After that, the user enter 'dog' in the search box and hit search using the same function. The function would assign 'dog' to the input variable. How would I compare the current value (dog) to the previously entered value (cat)? I have tried to assign the original input with a statement, something like var orig = input; but that would only overwrite the original input with the new input. What is the logical approach to this problem.

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  • Sending information between JavaScript and Web Services using AJAX

    - by COB-CSU-AM
    Alright so I'm using Microsoft's Web Services and AJAX to get information from a SQL database for use with java script on the client side. And I'm wondering what the best method is. Before I started working on the project, the web services were setup to return a C# List filled with some objects. Those objects variables (ints, strings, etc.) contain the data I want to use. Of course, java script can't do much with this, to the best of my knowledge. I then modified the web service to return a 2D Array, but java script got confused, and to the best of my knowledge can't handle 2D array's returned from C#. I then tried to use a regular array, but then a found the length property of an array in JS doesn't carry over, so I couldn't preform a for loop through all the items, because there wasn't anyway of knowing how many elements there were. The only other thing I can thing of is returning a string with special char's to separate the data, but this seems way too convoluted. Any suggestions? Thanks in advance!

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  • small scale web site - global javascript file style/format/pattern - improving maintainability

    - by yaya3
    I frequently create (and inherit) small to medium websites where I have the following sort of code in a single file (normally named global.js or application.js or projectname.js). If functions get big, I normally put them in a seperate file, and call them at the bottom of the file below in the $(document).ready() section. If I have a few functions that are unique to certain pages, I normally have another switch statement for the body class inside the $(document).ready() section. How could I restructure this code to make it more maintainable? Note: I am less interested in the functions innards, more so the structure, and how different types of functions should be dealt with. I've also posted the code here - http://pastie.org/999932 in case it makes it any easier var ProjectNameEnvironment = {}; function someFunctionUniqueToTheHomepageNotWorthMakingConfigurable () { $('.foo').hide(); $('.bar').click(function(){ $('.foo').show(); }); } function functionThatIsWorthMakingConfigurable(config) { var foo = config.foo || 700; var bar = 200; return foo * bar; } function globallyRequiredJqueryPluginTrigger (tooltip_string) { var tooltipTrigger = $(tooltip_string); tooltipTrigger.tooltip({ showURL: false ... }); } function minorUtilityOneLiner (selector) { $(selector).find('li:even').not('li ul li').addClass('even'); } var Lightbox = {}; Lightbox.setup = function(){ $('li#foo a').attr('href','#alpha'); $('li#bar a').attr('href','#beta'); } Lightbox.init = function (config){ if (typeof $.fn.fancybox =='function') { Lightbox.setup(); var fade_in_speed = config.fade_in_speed || 1000; var frame_height = config.frame_height || 1700; $(config.selector).fancybox({ frameHeight : frame_height, callbackOnShow: function() { var content_to_load = config.content_to_load; ... }, callbackOnClose : function(){ $('body').height($('body').height()); } }); } else { if (ProjectNameEnvironment.debug) { alert('the fancybox plugin has not been loaded'); } } } // ---------- order of execution ----------- $(document).ready(function () { urls = urlConfig(); (function globalFunctions() { $('.tooltip-trigger').each(function(){ globallyRequiredJqueryPluginTrigger(this); }); minorUtilityOneLiner('ul.foo') Lightbox.init({ selector : 'a#a-lightbox-trigger-js', ... }); Lightbox.init({ selector : 'a#another-lightbox-trigger-js', ... }); })(); if ( $('body').attr('id') == 'home-page' ) { (function homeFunctions() { someFunctionUniqueToTheHomepageNotWorthMakingConfigurable (); })(); } });

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  • Getting 'sections.each is not a function' with javascript / scriptaculous

    - by tonyyeb
    Hi all Trying an example piece of code for scriptaculous for doing some drag and drop. It works fine in IE8 but Firefox and Chrome generate an error of 'sections.each is not a function' Here is the code: function getGroupOrder() { var sections = document.getElementsByClassName('section'); var alerttext = ''; sections.each(function(section) { var sectionID = section.id; var order = Sortable.serialize(sectionID); var mySectionID = Right(section.id); var myLen = String(Sortable.sequence(section)).length; var StuCode = ""; if (myLen ==8) {var StuCode = String(Sortable.sequence(section)).substring(myLen, 2);} else if (myLen ==9) {var StuCode = String(Sortable.sequence(section)).substring(myLen, 3);} alerttext += mySectionID + ': ' + StuCode + '\n'; alerttextb = sectionID + ': ' + StuCode + '\n'; } } One solution suggested on a forum "I was able to resolve this issue by wrapping the call to document.getElementsByClassName('section'); with $A()" but I don't have a clue what that means! I asked what it meant but the post was made in 2008 and no reply as yet. Thanks for any help provided. Regards

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  • Javascript Replace text in string

    - by Tegan Snyder
    I'm having some troubles getting regex to replace all occurances of a string within a string. **What to replace:** href="/newsroom **Replace with this:** href="http://intranet/newsroom This isn't working: str.replace(/href="/newsroom/g, 'href="http://intranet/newsroom"'); Any ideas? Thanks, Tegan

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  • Javascript date comparison

    - by Art
    Why does equality operator return false in the first case? var a = new Date(2010, 10, 10); var b = new Date(2010, 10, 10); alert(a == b); // <- returns false alert(a.getTime() == b.getTime()); // returns true Why?

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  • using javascript replace() to match the last occurance of a string

    - by Dave
    I'm building an 'add new row' function for product variations, and I'm struggling with the regex required to match the form attribute keys. So, I'm basically cloning rows, then incrementing the keys, like this (coffeescript): newrow = oldrow.find('select, input, textarea').each -> this.name = this.name.replace(/\[(\d+)\]/, (str, p1) -> "[" + (parseInt(p1, 10) + 1) + "]" ) this.id = this.id.replace(/\_(\d+)\_/, (str, p1) -> "_" + (parseInt(p1, 10) + 1) + "_" ) .end() This correctly increments a field with a name of product[variations][1][name], turning it into product[variations][2][name] BUT Each variation can have multiple options (eg, color can be red, blue, green), so I need to be able turn this product[variations][1][options][2][name] into product[variations][1][options][3][name], leaving the variation key alone. What regex do I need to match only the last occurrence of a key (the options key)?

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  • Example from: "Javascript - The Good Parts"

    - by Matrym
    What "ugliness" does the following solve? There's something I'm not getting, and I'd appreciate help understanding what it is. For example, by augmenting Function.prototype, we can make a method available to all functions: Function.prototype.method = function (name, func) { this.prototype[name] = func; return this; }; By augmenting Function.prototype with a method method, we no longer have to type the name of the prototype property. That bit of ugliness can now be hidden.

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  • Javascript: find first n prime numbers

    - by bard
    function primeNumbers() { array = []; for (var i = 2; array.length < 100; i++) { for (var count = 2; count < i; count++) { var divisorFound = false; if (i % count === 0) { divisorFound = true; break; } } if (divisorFound == false) {array.push[i];} } return array; } When I run this code, it seems to get stuck in an infinite loop and doesn't return anything... why?

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  • Javascript - event listener toggle button

    - by user2546157
    I'm trying to create a button which can toggle "double click" to "single click" and in the opposite. For some reason, once it toggles to single click and it cannot toggle back. Can anyone please help! function init() { normal_listeners(); } function addListener(){ var image1 = document.getElementById('image_1'); var image2 = document.getElementById('image_2'); var image3 = document.getElementById('image_3'); if(document.getElementById('listener_1').value == "Listener"){ document.getElementById('listener_1').style.backgroundColor = "red"; alert("Normal"); image1.addEventListener("dblclick", function(){userChoice(1);}, false); image2.addEventListener("dblclick", function(){userChoice(2);}, false); image3.addEventListener("dblclick", function(){userChoice(3);}, false); document.getElementById('listener_1').value = "Normal"; } else if(document.getElementById('listener_1').value == "Normal") { document.getElementById('listener_1').style.backgroundColor = "green"; alert("Listener"); image1.addEventListener("click", function(){userChoice(1);}, false); image2.addEventListener("click", function(){userChoice(2);}, false); image3.addEventListener("click", function(){userChoice(3);}, false); document.getElementById('listener_1').value = "Listener"; } } function normal_listeners(){ var image1 = document.getElementById('image_1'); var image2 = document.getElementById('image_2'); var image3 = document.getElementById('image_3'); var listener1 = document.getElementById('listener_1'); listener1.addEventListener("click", addListener, false); image1.addEventListener("dblclick", function(){userChoice(1);}, false); image2.addEventListener("dblclick", function(){userChoice(2);}, false); image3.addEventListener("dblclick", function(){userChoice(3);}, false); } window.onload = init; <img id="image_1" src="rock.jpg" alt="ROCK" width="100" height="100"> <img id="image_2" src="paper.jpg" alt="PAPER" width="100" height="100"> <img id="image_3" src="scissors.jpg" alt="SCISSORS" width="100" height="100"> <input type="button" id="listener_1" value="Normal" style="background-color:red">

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  • Javascript: variable scope & the evils of globals

    - by Nick
    I'm trying to be good, I really am, but I can't see how to do it :) Any advice on how to not use a global here would be greatly appreciated. Let's call the global G. Function A Builds G by AJAX Function B Uses G Function C Calls B Called by numerous event handlers attached to DOM elements (type 1) Function D Calls B Called by numerous event handlers attached to DOM elements (type 2) I can't see how I can get around using a global here. The DOM elements (types 1 & 2) are created in other functions (E&F) which are unconnected with A. I don't want to add G to each event handler (because it's large and there's lots of these event handlers), and doing so would require the same kind of solution as I'm seeking here (i.e., getting G to E&F). The global G, BTW, is an array that is necessary to build other elements as they, in turn, are built by AJAX. I'm not convinced that a singleton is real solution, either. Thanks.

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  • JavaScript loop stops on "localStorage.removeItem"

    - by user1755603
    Why is the "localStorage.removeItem" stopping the loop? If I remove "localStorage.removeItem" and only leave the "alert", it loops though whole thing, but with "localStorage.removeItem" it stops on the first match. function removeTask() { for (i=0; i < localStorage.length; i++){ checkbox = document.getElementById('utford'+i); if (checkbox.checked == true) { alert(i); localStorage.removeItem(localStorage.key(i)); } } printList(); }

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