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  • JavaScript Object literal notation confusion

    - by Ding
    In Firefox console, this code will generate error: {"d" : ["bankaccountnumber", "$1234.56"] } SyntaxError: invalid label { message="invalid label", more...} this code works just fine {d : ["bankaccountnumber", "$1234.56"] } ["bankaccountnumber", "$1234.56"] this code works fine as well var act = {'d' : ["bankaccountnumber", "$1234.56"] } a.d Can someone help to explain why is the diference? thanks!

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  • Javascript: Enable checkboxes list when a checkbox is checked (With Prototype)

    - by BoDiE2003
    Guys, Ive been using jquery to do this, but now I need to do it with Prototype and Im little confused due lack of documentation I have 2 lists of check boxes First List: Check box 1 Check box 2 Second list: Check box x check box y check box z I need the JS code, using prototype to work like this: Second list, remains disabled unless I check one of the checkboxes of the First List. Any suggestions, or help, please! Thankyou.

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  • Doesn't JavaScript support closures with local variables?

    - by qollin
    I am very puzzled about this code: var closures = []; function create() { for (var i = 0; i < 5; i++) { closures[i] = function() { alert("i = " + i); }; } } function run() { for (var i = 0; i < 5; i++) { closures[i](); } } create(); run(); From my understanding it should print 0,1,2,3,4 (isn't this the concept of closures?). Instead it prints 5,5,5,5,5. I tried Rhino and Firefox. Could someone explain this behavior to me? Thx in advance.

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  • performing a javascript event without triggering that event handler

    - by bento
    In my latest code, I have an event handler for a focus on a textarea. When the user clicks on the textarea, that event-handler is triggered which sets some other DOM states based on the selected textarea. However, elsewhere in my program I want to programmatically set the focus of the textarea without triggering that event handler. I know Backbone, for instance, has a way to silently perform an action. My only pseudo-solution is to temporarily set a variable: var silence = true; And then, in my event handler, only perform the logic if silence is false. The handler is still triggered, but the logic doesn't run. Does anyone else know of better strategies for this?

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  • Cross-domain data access in JavaScript

    - by vit
    We have an ASP.Net application hosted on our network and exposed to a specific client. This client wants to be able to import data from their own server into our application. The data is retrieved with an HTTP request and is CSV formatted. The problem is that they do not want to expose their server to our network and are requesting the import to be done on the client side (all clients are from the same network as their server). So, what needs to be done is: They request an import page from our server The client script on the page issues a request to their server to get CSV formatted data The data is sent back to our application This is not a challenge when both servers are on the same domain: a simple hidden iframe or something similar will do the trick, but here what I'm getting is a cross-domain "access denied" error. They also refuse to change the data format to return JSON or XML formatted data. What I tried and learned so far is: Hidden iframe -- "access denied" XMLHttpRequest -- behaviour depends on the browser security settings: may work, may work while nagging a user with security warnings, or may not work at all Dynamic script tags -- would have worked if they could have returned data in JSON format IE client data binding -- the same "access denied" error Is there anything else I can try before giving up and saying that it will not be possible without exposing their server to our application, changing their data format or changing their browser security settings? (DNS trick is not an option, by the way).

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  • jQuery/javascript events - prototype event handler

    - by Brian M. Hunt
    The following code doesn't work as I intuitively expect it to: function MyObject(input) { input.change(this._foo); this.X = undefined; } MyObject.prototype._foo = function() { alert("This code is never called"); // but if it did this.X = true; } var test_input = $("input#xyz"); // a random, existing input var m = MyObject(test_input); // attach handler (or try to) test_input.change(); // trigger event alert(m.X); // undefined I'd expect that _foo() would be called (and, if that ever happens, that the this variable in _foo() would be an instantiation of MyObject. Does anyone know why this doesn't work, and of any alternative pattern for passing an object to an event handler? Thank you for reading. Brian

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  • Unsure how to design JavaScript / jQuery functionality which uses XML to create HTML objects

    - by Jack Roscoe
    Hi, I'm using JavScript and jQuery to read an XML document and subsequently use the information from the XML to create HTML objects. The main 'C' nodes in the XML document all have a type attribute, and depending on the type I want to run a function which will create a new html object using the other attributes assigned to that particular 'C' node node. Currently, I have a for loop which extracts each 'C' node from the XML and also it's attributes (e.g. width, height, x, y). Also inside the for loop, I have an if statement which checks the 'type' attribute of the current 'C' node being processed, and depending on the type it will run a different function which will then create a new HTML object with the attributes which have been drawn from the XML. The problem is that there may be more than one 'C' node of the same type, so for example when I'm creating the function that will run when a 'C' node of 'type=1' is detected, I cannot use the 'var p = document.createElement('p')' because if a 'C' node of the same type comes up later in the loop it will clash and override that element with that variable that has just been created. I'm not really sure how to approach this? Here is my entire script. If you need me to elaborate on any parts please ask, I'm sure it's not written in the nicest possible way: var arrayIds = new Array(); $(document).ready(function(){ $.ajax({ type: "GET", url: "question.xml", dataType: "xml", success: function(xml) { $(xml).find("C").each(function(){ arrayIds.push($(this).attr('ID')); }); var svgTag = document.createElement('SVG'); // Create question type objects function ctyp3(x,y,width,height,baC) { alert('test'); var r = document.createElement('rect'); r.x = x; r.y = y; r.width = width; r.height = height; r.fillcolor = baC; svgTag.appendChild(r); } // Extract question data from XML var questions = []; for (j=0; j<arrayIds.length; j++) { $(xml).find("C[ID='" + arrayIds[j] + "']").each(function(){ // pass values questions[j] = { typ: $(this).attr('typ'), width: $(this).find("I").attr('wid'), height: $(this).find("I").attr('hei'), x: $(this).find("I").attr('x'), y: $(this).find("I").attr('x'), baC: $(this).find("I").attr('baC'), boC: $(this).find("I").attr('boC'), boW: $(this).find("I").attr('boW') } alert($(this).attr('typ')); if ($(this).attr('typ') == '3') { ctyp3(x,y,width,height,baC); // alert('pass'); } else { // Add here // alert('fail'); } }); } } }); });

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  • Javascript Cookie Function not working for Domain

    - by danit
    Here are the functions Im using: Set Cookie: function set_cookie ( name, value, exp_y, exp_m, exp_d, path, domain, secure ) { var cookie_string = name + "=" + escape ( value ); if ( exp_y ) { var expires = new Date ( exp_y, exp_m, exp_d ); cookie_string += "; expires=" + expires.toGMTString(); } if ( path ) cookie_string += "; path=" + escape ( path ); if ( domain ) cookie_string += "; domain=" + escape ( domain ); if ( secure ) cookie_string += "; secure"; document.cookie = cookie_string; } Read Cookie: function get_cookie ( cookie_name ) { var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' ); if ( results ) return ( unescape ( results[2] ) ); else return null; } Delete Cookie: function delete_cookie ( cookie_name ) { var cookie_date = new Date ( ); // current date & time cookie_date.setTime ( cookie_date.getTime() - 1 ); document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString(); } The Jquery I use to construct the cookie: if(get_cookie('visible')== 'no') { $("#wrapper").hide(); $(".help").hide(); $("#slid .show").show(); $("#slid .hide").hide(); } else { $("#slid .show").hide(); $("#slid .hide").show(); } $("#slider").click(function() { if(get_cookie('visible')== null) { set_cookie('visible','no', 2020, 01,01, '/', 'domain.com'); } else { delete_cookie('visible'); } $(".help").slideToggle(); $("#wrapper").animate({ opacity: 1.0 },200).slideToggle(200, function() { $("#slid img").toggle(); }); }); Im trying to set the cookie for all pages that exist under domain.com with the path '/'. However using these functions and jQuery it doesn't appear to be working, any anyone give me an idea of where im going wrong?

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  • jQuery.param() - doesn't serialize javascript Date objects?

    - by ehahn9
    jQuery.param({foo: 1}); // => "foo=1" - SUCCESS! jQuery.param({bar: new Date()}); // => "" - OUCH! There is no problem with encodeURIComponent(new Date()), which is what I would have thought param is calling for each member. Also, explicitly using "traditional" param (e.g. jQuery.param(xxx, true)) DOES serialize the date, but alas, that isn't of much help since my data structure isn't flat. Is this because typeof(Date) == "object" and param tries to descend into it to find scalar values? How might one realistically serialize an object that happens to have Date's in it for $.post() etc.?

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  • How do I use a custom xml entity in a javascript file

    - by tmim
    I have an 'overlay.dtd' file with a line like <!ENTITY myentity "myvalue">. At the top of my xul file I have <!DOCTYPE overlay SYSTEM 'chrome://myaddon/locale/overlay.dtd'>. In my xul file, I have <script src='myscript.js'>. I want to know if there is any way to access 'myentity' from the script. alert("&myentity;") just alerts "&myentity;"

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  • Javascript Canvas Element - Array Of Images

    - by Ben Shelock
    I'm just learning JS, trying to do things without jQuery, and I want to make something similar to this however I want to use an array of images instead of just the one. My image array is formed like this var image_array = new Array() image_array[0] = "image1.jpg" image_array[1] = "image2.jpg" And the canvas element is written like this. (Pretty much entirely taken from the Mozilla site) function draw() { var ctx = document.getElementById('canvas').getContext('2d'); var img = new Image(); img.src = 'sample.png'; img.onload = function(){ for (i=0;i<5;i++){ for (j=0;j<9;j++){ ctx.drawImage(img,j*126,i*126,126,126); } } } } It uses the image "sample.png" in that code but I want to change it to display an image from the array. Displaying a different one each time it loops. Apoligies if I've not explained this well.

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  • Inline function and global variable issue in Javascript

    - by Natim
    I have some code here : http://bitbucket.org/natim/lo53_tp1/src/tip/part3/camions/medias/js/tracking.js That I use to draw some information about trucks direction. The problem come from a function defined in a for loop like this one : ... for(i = 0; i < nb_trucks; i++) { ... contentString = '<div id="content">'+ trucks[i]['name'] + '</div>'; current_window = new google.maps.InfoWindow({ content: contentString }); infosWindow.push(current_window); current_marker = new google.maps.Marker({ map: map, position: new google.maps.LatLng(trucks[i]['end']['lat'], trucks[i]['end']['lon']), draggable: false, title: trucks[i]['name'] }); markers.push(current_marker); google.maps.event.addListener(current_marker, 'click', function() { current_window.open(map, current_marker); }); } In this code, you can see the last block google.maps.event.addListener(current_marker, 'click', function() { current_window.open(map, current_marker); }); And my problem is that current_marker in the addListener parameters is different from the one inside the function. The current_window and the current_marker inside the function is overide at each loop turn. How can I get it right ? Thanks

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  • Advanced Form Validation in JavaScript

    - by Kaji
    I'm already familiar with how to use onSubmit to evaluate form content against RegEx to ensure it meets static parameters for acceptable content. What I'm wondering is if there is a way to further provide validation against a MySQL database, such as if you want to make sure an e-mail address hasn't been used yet before submitting a form and having to re-load the field data back into the proper places for correction.

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  • javascript - rollover effect on overlapping transparent images

    - by user427969
    I want to add rollover effect on overlapping transparent images. For example: The following image is divided into 5 parts and I want to add rollover effect (different image) on each of them When O tried with div or img tag, the image is rendered as a rectangle so rollover effect is not proper. When i rollover on green part between yellow, the yellow image gets highlighted because its z-index is high. Following is the code that I tried: <body> <br /> <img src="part1.png" onclick="console.log('test1');"/> <img src="part2.png" onclick="console.log('test2');" style="position:absolute; left:30px; top: 19px;"/> <img src="part3.png" onclick="console.log('test3');" style="position:absolute; left:70px; top: 15px;"/> <img src="part4.png" onclick="console.log('test4');" style="position:absolute; left:95px; top: 16px;"/> <img src="part5.png" onclick="console.log('test5');" style="position:absolute; left:123px; top: 24px;"/> </body> images = , , , , I don't want to use jQuery, if possible.

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  • Javascript button

    - by Deven
    hello friends i am developing button which generate another button and this button also calls function in which its id is passed as argument but i am getting error that id is undifined even i set its id attribute before it is added to ma web page

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  • javascript mouse cursor change on page load in firefox browser 3.5

    - by Amit
    Hi in case of full page submit a trasparent div id coming and changing the cursor to 'wait' . Now when the page is getting submitted and new page is coming up cursor still remains to 'wait' not changing to default until mouse is moved in Firefox Here is simple html click on show button div is coming when user move mouse over the div cursor is changing as wait cursor. Now when this page is loaded again pressing F5 cursor remain as wait cursor in firefox its working fine in IE is there any way to make the cursor as default on pageload in Firefox <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Untitled Document</title> <style> body{ cursor:default; } </style> <script src="js/jquery.js"> </script> <script> var test = true; $(document).ready(function(){ $('#maindiv').css('display','none') }); function showDiv(){ $('#maindiv').css('display','block') } </script> </head> <body> <div id="divBody" style="background-color:red;width:500px;height:500px" >aa <div id="maindiv" style="background-color:#999999;height:100$;width:400px;height:400px;cursor:wait"> sss </div>aa </div> <input type="button" value="show" onclick="showDiv()"/> </body> </html>

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  • [JavaScript] Loading Google Maps API after the page is displayed

    - by Goro
    Hello, My landing page contains a big google maps portion, which slows down the loading time. I am trying to do the following: Load the static elements first so the page loads fast initially. Display a loading notification in the map placeholder so that the user knows that the map is coming up Load and display the map I have done this: $(document).ready(function() { map_initialize(); } map_initialize() being the function which loads the map into its container div. However, this still will not display the static elements fist. The page will wait until the map_initialize() is finished, then load the static elements at the same time as the map. Thanks,

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  • Nesting quotes in JavaScript/HTML

    - by Ryan Elkins
    How do you nest quotes in HTML beyond the second level? As far as I know, there are only 2 types of quotes - single(') and double("). I am aware of escaping - you have to escape in the code but it converts the escaped quotes back to regular quotes when it hits the browser. What is the accepted method to get around something like the following? <p onclick="exampleFunc('<div id="divId"></div>');">Some Text</p> That code prints to the browser: ');"Some Text

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  • Modifying CSS class property values on the fly with JavaScript / jQuery

    - by JPN
    all. I've run into a unique situation that I have so far been unable to find a solution for: dynamically assigning a value to a CSS style. I know how to use jQuery to assign width, height, etc. to an element, but what I'm trying to do is actually change the value defined in the stylesheet so that the dynamically-created value can be assigned to multiple elements. What I'm building is a slideshow of images that occupy the full viewport, recalculating the image's width, height, and left properties on resize so that the image is always centered, favors width over height, except when the viewport is taller than it is wide (resizing does not reload the page, just fires a function to resize the image). I have successfully been able to get it to work on one image, and now I'm trying to determine the best way to assign those property values to all images in the slideshow without having to specify those three things individually for every image. Can the values of properties in a class be modified on the fly? I'm sure the answer is out there, I'm probably just not using the correct terminology in my searches. Hope I did a good job of describing the problem. TIA.

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  • Using textbox text in javascript

    - by Jambo
    I am working with Twitter widgets with the following script- <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <input type="button" value="Run Function" onclick="test();" /> <script> function test() { new TWTR.Widget({ version: 3, type: 'profile', rpp: 8, interval: 30000, width: 315, height: 340, theme: { shell: { background: '#333333', color: '#ffffff' }, tweets: { background: '#000000', color: '#ffffff', links: '#4aed05' } }, features: { scrollbar: false, loop: false, live: false, behavior: 'all' } }).render().setUser(document.getElementById('TextBox1').value).start(); } When using the function test(); in the button click it is ocming up with the error - Error: Unable to get value of the property 'value': object is null or undefined So it seems like it is not getting to the value at - (document.getElementById('TextBox1').value) I am not sure why it is null if the text box has a value and then the script is run on the button click?

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  • Javascript Popup Windows

    - by sikas
    I have a popup window code that I have used before in login forms. The code displays an in-page popup. This is the code: <?php //In Page Popup Box with Faded Background by Jerry Low @crankberryblog.com //Find other useful scripts at the Crankberry Blog //SETTINGS $fade_amount = 60; //In Percentage $box_width = 400; $box_background = 'FFFFFF'; //Hex Color $box_border_width = 2; $box_border_color = '999999'; //Hex Color $close_box = 1; //Do You Want The Close Bar on Top 1 = Yes, 0 = No $extension = ""; // Other Variables that maybe needed, page number etc. //Begin Popup Box $left_margin = ( 0 - ($box_width*0.5) ); $page_url = basename($_SERVER['PHP_SELF']); if ($extension!="") $page_url .= '?' . $extension; if (isset($_GET['popup'])) { echo '<div class="popup" style="width:'.$box_width.'px; background: #'.$box_background.'; margin-left:'.$left_margin.'px;'; if ($box_border_width>1) echo ' border: '.$box_border_width.'px solid #'.$box_border_color.';'; echo '">'; //Close Box if ($close_box===1) echo '<div class="popup_close"><a href="'.$page_url.'">Close (x)</a></div>'; ?> <!–- START YOUR POPUP CONTENT HERE -–> Popup content goes in here! <!–- END OF YOUR POPUP CONTENT HERE -–> <?php echo '</div> <div class="fade" onclick="location.replace(\''.$page_url.'\');" style="opacity: 0.'.$fade_amount.'; -moz-opacity: 0.'.$fade_amount.';filter: alpha(opacity: '.$fade_amount.');"></div> <div class="fade_container">'; } ?> <a href="?popup=1<?php if ($extension!="") echo '&' . $extension; ?>">Activated Box</a> This code contains a link that reloads the page with parameters/arguments to show the popup. I want to update this code to make the popup appear/hide without This is what I have done so far, yet the popup doesn`t show. Now I want to update the code to work as follows. <link rel=StyleSheet href="css/popup.css" type="text/css" media=screen></link> <?php //In Page Popup Box with Faded Background by Jerry Low @crankberryblog.com //Find other useful scripts at the Crankberry Blog //SETTINGS $fade_amount = 60; //In Percentage $box_width = 400; $box_background = 'FFFFFF'; //Hex Color $box_border_width = 2; $box_border_color = '999999'; //Hex Color $close_box = 1; //Do You Want The Close Bar on Top 1 = Yes, 0 = No $extension = ""; // Other Variables that maybe needed, page number etc. //Begin Popup Box $left_margin = ( 0 - ($box_width*0.5) ); $page_url = basename($_SERVER['PHP_SELF']); if ($extension!="") $page_url .= '?' . $extension; { echo '<div id="pop_up" class="popup" style="visibility:hidden; width:'.$box_width.'px; background: #'.$box_background.'; margin-left:'.$left_margin.'px;'; if ($box_border_width>1) echo ' border: '.$box_border_width.'px solid #'.$box_border_color.';'; echo '">'; //Close Box if ($close_box===1) echo '<div class="popup_close"><a href="#" ChangeStatus()>Close (x)</a></div>'; ?> <!–- START YOUR POPUP CONTENT HERE -–> Popup content goes in here! <!–- END OF YOUR POPUP CONTENT HERE -–> <?php echo '</div> <div id="fade_div" class="fade" onclick="location.replace(\''.$page_url.'\');" style="visibility:hidden; opacity: 0.'.$fade_amount.'; -moz-opacity: 0.'.$fade_amount.';filter: alpha(opacity: '.$fade_amount.');"></div> <div class="fade_container">'; } ?> <a href="#" onClick="ChangeStatus()">Activated Box</a> <script> function ChangeStatus() { div = document.getElementById('fade_div').style.visibility; popup = document.getElementById('pop_up').style.visibility; alert(popup); if(popup == "hidden") { div = "visible"; popup = "visible"; } else { div = "hidden"; popup = "hidden"; } } </script> ignore the CSS files as it is working fine. I guess the problem is with the JS. Can anyone help me?

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