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• javascript hide/show tabs using JQuery

  - by JohnMerlino

  Hey all, I have a quick question of how I can use jquery tabs (you click on link button to display/hide certain divs). The div id matches the href of the link: HTML links: <table class='layout tabs'> <tr> <td><a href="#site">Site</a></td> <td><a href="#siteno">Number</a></td> </tr> <tr> <td><a href="#student">Student</a></td> <td><a href="#school">School</a></td> </tr> </table> </div> div that needs to display/hide: <div id="site"> <table class='explore'> <thead class='ui-widget-header'> <tr> <th class=' sortable'> Site </th> <th class=' sortable'> Number </th> </tr> </thead> </table> </div> Thanks for any response.

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• How much does Javascript garbage collection affect performance?

  - by Long Ouyang

  I'm writing a bunch of scripts that present images serially (e.g. 1 per second) and require the user to make either a keyboard or mouse response. I'm using closures to handle the timing of image presentation and user input. This causes garbage collection to happen pretty frequently and I'm wondering if that will affect the performance (viz. timing of image presentation).

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• Javascript appending onload to a popup window

  - by Hypnotic Meat

  I'm trying to append an onload event to a popup window in the following manner: var explorerWindow = window.open(PARAMS...); explorerWindow.onload = function() {window.opener.unlockObj(id);} The idea is to make the button that generates the popup window readonly, making it usable again once the popup window has loaded all of its contents. However, the event doesn't seem to be firing at all. I even changed it to the following and got nothing: explorerWindow.onload = function() {alert("bloop");} Is there something terribly wrong with my syntax or am I missing something else entirely? Also, I'm using JQuery if there are any appropriate gems there that will help in this situation. I tried the following with similar results, but I'm not so sure I got the call right: $(explorerWindow).load(function() {alert("bloop");}); Any help is greatly appreciated.

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• JavaScript open in a new window, not tab

  - by adam

  I have a select box that calls window.open(url) when an item is selected. Firefox will open the page in a new tab by default. However, I would like the page to open in a new window, not a new tab. How can I accomplish this?

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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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• Help improve this Javascript code?

  - by Galilyou

  Hello SO, In short, I'm dealing with Telerik's RadTreeView, and I want enable checking all the child nodes if the user checked the parent node. Simple enough! OK here's my code that handles OnClientNodeChecked event of the TreeView: function UpdateAllChildren(nodes, checked) { var i; for (i = 0; i < nodes.get_count(); i++) { var currentNode = nodes.getNode(i); currentNode.set_checked(checked); alert("now processing: " + currentNode.get_text()); if (currentNode.get_nodes().get_count() > 0) { UpdateAllChildren(currentNode.get_nodes(), checked); } } } function ClientNodeChecked(sender, eventArgs) { var node = eventArgs.get_node(); UpdateAllChildren(node.get_nodes(), node.get_checked()); } And here's the TreeView's markup: <telerik:RadTreeView ID="RadTreeView1" runat="server" CheckBoxes="True" OnClientNodeChecked="ClientNodeChecked"></telerik:RadTreeView> The tree contains quite a lot of nodes, and this is causing my targeted browser (ehm, that's IE7) to really slow down while running it. Furthermore IE7 displays an error message asking me to stop the page from running scripts as it's might make my computer not responsive (yeah, scary enough). So what do you guys propose to optimize this code? Thanks in advance

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• Variable scope in javascript

  - by Rich Bradshaw

  This is a simple question, but I can't work it out. The specifics aren't important, but here's the gist. I have some code like this: var lat = 0; var lon = 0; if (navigator.geolocation) { navigator.geolocation.getCurrentPosition(function(position) { lat = position.coords.latitude; lon = position.coords.longitude; }); } What I think it's doing is: Set lat and lon to 0 If the browser has geolocation, overwrite those variables with real values However, at the end of that chunk, lat and lon are still 0. I've tried adding vars, passing lat and lon to the function etc but with no success... How do I make this work?

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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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• 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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• What's wrong in my JavaScript code?

  - by DarkLightA

  I can't figure out what's wrong. var CarObj = function(passengers, maxLoad, wheels, doors, maxSpeed) { this.passengers = passengers; this.maxLoad = maxLoad; this.wheels = wheels; this.doors = doors; this.maxSpeed = maxSpeed; }; var ferrari = new CarObj(4, "700kg", 4, 2, "360km/h"); var output = new Array(); for (var i = 0; i < ferrari.length; i++) { for (var a in ferrari) { output[i] = a; } } document.getElementById('ELEMENTHERE').innerHTML = (output.join(" "));

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• How to get the root path in JavaScript?

  - by Axel

  I am using mod_rewrite to remap the URLs in my website in the following format: http://www.mydomain.com/health/54856 http://www.mydomain.com/economy/strategy/911025/ http://www.mydomain.com/tags/obama/new The problem is that I am making AJAX calls to a file: http://www.mydomain.com/login.php And I don't want to write the FULL url or even use the ../ trick because there isn't a fixed level of folders. So, what i want is something to access the login.php from the root, whatever the domain name is: $.ajax({ type: "POST", url: "http://www.mydomain.com/login.php" });

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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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• jquery / javascript for a user to select 1 of n images

  - by TesterTurnedDeveloper

  I want to display a few images (probably 5 max) and have a user click to select one. First thing I tried was radio buttons and putting the images inside labels. <input type="radio" name="BackgroundId" id="BackgroundId" value="1" /> <label for="BackgroundId"><img src="../../Content/images/thumb_1.jpg" /></label> Firefox will select the radio button when the user clicks the image, but IE doesn't. Is there a jquery plugin that will make the images clickable? Fancy-form looks like something I could use, but it isn't jquery and I've already got jquery in my project. Or can someone point me to a better way of selecting a single image?

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• detecting object-reference duplication across JavaScript files

  - by AnC

  I have a number of files with contents like this: function hello() { ... element1.text = foo.locale.lorem; element2.text = foo.locale.ipsum; ... elementn.text = foo.locale.whatever; ... } function world() { ... var label = bar.options.baz.blah; var toggle = bar.options.baz.use_toggle; ... } This could be written more efficiently, and also be more readable, by creating a shortcut to the locale object: function hello() { var loc = foo.locale; ... element1.text = loc.lorem; element2.text = loc.ipsum; ... elementn.text = loc.whatever; ... } function world() { var options = bar.options.baz; ... var label = options.blah; var toggle = options.use_toggle; ... } Is there a simple way to detect occurrences of such duplication for any arbitrary object (it's not always as simple as "locale", or foo.something)? Basically, I wanna know where lengthy object references appear two or more times within a function. Thanks!

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• jquery javascript module architecture on a website

  - by stephan

  I want to write a module on one html site - I will never leave the site I think about two possible concurrent basic approaches: We go into the module by use only a specific function (with specific params - everything which will happen, happen there - logic, exception handling etc) We go in by using one handler-fct, which manages some kind of action & a dataArray (depending on the action also fcts will be called - but not directly maybe for exception handling) So what you prefer?!

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• Using JQuery replaceWith with a JavaScript Variable

  - by JJ56

  Here's my html: <div class="timer">Not Started</div> And JS/JQ: var seconds = 10; var minutes = 0; setTimeout("updateTimer()", 1000); function updateTimer() { if (seconds == 0 && minutes != 0) { minutes -= minutes; seconds = 59; alert (seconds); } else if (seconds == 1 && minutes == 0) { alert ('done'); } else { seconds = seconds - 1; //alert (seconds); $(".timer").replaceWith(seconds); } setTimeout("updateTimer()", 1000); } Instead of replacing Not Started with 10, 9, 8..., Not Started disappears.

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• Scope of variables inside of javascript

  - by wcpro

  I have the following code sample that im trying to wrap my head around $(document).ready(function () { test("load json", function () { length = 0; // length = 0 $.getJSON("plugins/form.json", function (data) { length = data.fields.length; // length = 4 }); ok(length == 4, "length = " + length.toString()); // length = 0? wtf? }); }); the 'length' variable does not persist when the $.getJSON runs. I cant figure out if its because its asynchronous or because the variable is out of scope.

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• Clever "add tag" javascript help needed

  - by Camran

  I have this function for adding options to a Select list: function addOption(selectbox, value, text, cl ) { var optn = document.createElement("OPTION"); optn.text = text; optn.value = value; if (cl==1){ optn.className = "nav_option_main"; } selectbox.options.add(optn); } I have just discovered the "optgroup" tag, but I don't know how to implement it to the drop list. The function above is called on another selectboxes "OnChange" event, to fill sub-select-box with the desired options. I don't think it should be too difficult to add the "optgroup" tag into this, or is it? Thanks and if you need more input let me know...

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• Enable submit button javascript ( asp page )

  - by Filipe Costa

  Good morning. By default, and i don't know why, when the page ends the rendering, i get the submit button disabled. <input type="submit" class="buttonColor" disabled="disabled" id="MyMatrix_ctl10_Form_btnSubmit" value="Enviar" name="MyMatrix$ctl10$Form$btnSubmit"> I need some way to enable it, or else i can't submit the form. How can i do it? Thanks.

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• Get Image size using Javascript during file upload

  - by Sri Kumar

  Hi, I have file upload UI element in which the user will upload images. Here I have to control the validate the height and width of the image in client side. Is it possible to find the size of the image having only the file path in JS?

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• looking for a javascript engine

  - by c0f33.alex

  i'm looking for a js engine to that I can (easily) expose C/C++ functions, classes etc. The API should allow changing exposed values from within C++ (by storing some kind of pointer or reference to an object inside js or so...). I've considered using google's v8 but I'm new to it and don't know whether it will satisfy my requirements. Can someone tell me whether I should stick to v8 or try something else?

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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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• How do I return a variable in javascript?

  - by bmckim

  I am working with the google maps API and whenever I return the variable to the initialize function from the codeLatLng function it claims undefined. If I print the variable from the codeLatLng it shows up fine. var geocoder; function initialize() { geocoder = new google.maps.Geocoder(); var latlng = new google.maps.LatLng(40.730885,-73.997383); var addr = codeLatLng(); document.write(addr); } function codeLatLng() { var latlng = new google.maps.LatLng(40.730885,-73.997383); if (geocoder) { geocoder.geocode({'latLng': latlng}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { if (results[1]) { return results[1].formatted_address; } else { alert("No results found"); } } else { alert("Geocoder failed due to: " + status); } }); } } prints out undefined If I do: var geocoder; function initialize() { geocoder = new google.maps.Geocoder(); var latlng = new google.maps.LatLng(40.730885,-73.997383); codeLatLng(); } function codeLatLng() { var latlng = new google.maps.LatLng(40.730885,-73.997383); if (geocoder) { geocoder.geocode({'latLng': latlng}, function(results, status) { if (status == google.maps.GeocoderStatus.OK) { if (results[1]) { document.write(results[1].formatted_address); } else { alert("No results found"); } } else { alert("Geocoder failed due to: " + status); } }); } } prints out New York, NY 10012, USA

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• Converting HTML entities to Unicode character in JavaScript?

  - by Michael

  Sample Conversions &amp; -> `&` &gt; -> `>` Any small library function that can handle this?

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• Javascript onresize event

  - by blogofsongs

  If I have this window.onresize = function() { alert('resized!!'); }; My function gets fired multiple times throughout the resize, but I want to capture the completion of the resize. This is in IE. Any ideas? There are various ideas out there, but not has worked for me so far (example IE's supposed window.onresizeend event.)

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