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• overflow-x AND Middle Mouse Button Moving

  - by Rad The Mad

  My Page is 980px in Width, but I have a few design elements (which belong with the background). I positioned them with position: absolute;. This creates a horizontal scrollbar for those who have a =< 1024 resolution. I disabled that scrollbar with overflow-x:hidden on (and for IE7 and etc). However, when I hold my middle mouse button,(i think this applies to laptop touchpads as well) it let's me move around to the right, is it possible to fix this with anything? (javascript, css)? Tested this issues in Chrome, IE, Firefox.

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• HTML form requirements specification

  - by Peder

  I am building a framework that will validate forms both client-side (javascript) and server-side based on a form requirements specification written in json. The purpose is to get rid of logically equivalent code on the server and client to make the code more maintainable, faster to write, and less buggy. The specification format may look something like: { '&lt;field_name>' : ['&lt;validation_function>', 'req', ['&lt;requirement>', &lt;param>], ...], ... } ( the requirement list is ordered so that the user can get most basic error messages first, the 'req' requirement must come first if it exists and means that the field is required) e.g.) { 'name' : ['string', 'req', ['min',6], ['max',150], ['match', /^[\sa-z0-9ÅÄÖåäö&]$/i], ['not_match', /^tmp_/]], 'email' : ['email', 'req'], 'email_confirm' : ['same_as', 'email'], 'password' : ['string', 'req', ['min', 6], ['max', 64], ['match', /^[a-z0-9\!@#\$%^&*_+.]$/i] ], } Does anyone know of a similar technology? I think the Rails validation framework solves the problem on the wrong level because I have found that forms often operate on more than one model.

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• Collect DOM elements from external HTML documents

  - by sonofdelphi

  I am trying to write a report-generator to collect user-comments from a list of external HTML files. User-comments are wrapped in < span elements. Can this be done using JavaScript? Here's my attempt: function generateCommentReport() { var files = document.querySelectorAll('td a'); //Files to scan are links in an HTML table var outputWindow = window.open(); //Output browser window for report for(var i = 0; i<files.length; i++){ //Open each file in a browser window win = window.open(); win.location.href = files[i].href; //Scan opened window for 'comment's comments = win.document.getElementsByName('comment'); for(var j=0;j<comments.length;j++){ //Add to output report outputWindow.document.write(comment[i].innerHTML); } } }

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• Changing Jquery Calendar size using google hosted theme

  - by Ali

  I am trying to implement the Jquery datepicker using a google hosted theme. But the Calendar is too big. Can I make it a smaller version by altering the function itself seeing I cant change the theme? <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/start/jquery-ui.css" type="text/css" media="all" /> <script type="text/javascript" src="jquery.js"></script> $(function() { $("#datepicker").datepicker({ dateFormat: $.datepicker.W3C}); }); Thanks

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• What is ExtJS philosophy? Single page application?

  - by stach

  I need to write my next project using ExtJs. It's a nice Javascript lib but I don't fully understand the idea behind it. Take the docs page for example: http://www.extjs.com/deploy/dev/docs/ Am I supposed to write my web applications with extjs like that? One page that should never be refreshed, and everything getting done by AJAX? How do you debug such applications if getting to the right place may take a lot of 'clicking' and working with it. You cannot fix the bug and hit refresh in the browser to see the results. Any suggestions?

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• Finding changes in MongoDB database

  - by Jonathan Knight

  I'm designing a MongoDB database that works with a script that periodically polls a resource and gets back a response which is stored in the database. Right now my database has one collection with four fields , id, name, timestamp and data. I need to be able to find out which names had changes in the data field between script runs, and which did not. In pseudocode, if(data[name][timestamp]==data[name][timestamp+1]) //data has not changed store data in collection 1 else //data has changed between script runs for this name store data in collection 2 Is there a query that can do this without iterating and running javascript over each item in the collection? There are millions of documents, so this would be pretty slow. Should I create a new collection named timestamp for every time the script runs? Would that make it faster/more organized? Is there a better schema that could be used? The script runs once a day so I won't run into a namespace limitation any time soon.

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• Can this rectangle to rectangle intersection code still work?

  - by Jeremy Rudd

  I was looking for a fast performing code to test if 2 rectangles are intersecting. A search on the internet came up with this one-liner (WOOT!), but I don't understand how to write it in Javascript, it seems to be written in an ancient form of C++. Can this thing still work? Can you make it work? struct { LONG left; LONG top; LONG right; LONG bottom; } RECT; bool IntersectRect(const RECT * r1, const RECT * r2) { return ! ( r2->left > r1->right || r2->right left || r2->top > r1->bottom || r2->bottom top ); }

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• Determine IP# of domain from client browser

  - by Tim W.

  Greetings all, I would very much like to determine the IP# of a domain from client script. It's for use in a testing application to determine whether or not a certain domain is set to a QA address as opposed to the address live on the . The testing machine will have it's host file set to resolve a domain to the QA address. Pinging from the server won't help since the server is getting the public DNS address. Is this possible in JavaScript? Maybe a Flash could do the trick?

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• Implementing a multi-state planner

  - by MoominTroll

  I've been asked to develop a system wherein employees can mark on a form their availability on a given day of the week - for instance an employee could mark themselves as available on a given time on a given week, and unavailable on some other time. It looks a little like this: Currently this works by rendering checkboxes within the table, picking up click events in each cell and marking the checkbox and hence the cell appropriately. I'm using the JQuery "click n drag checkbox" plugin from here. However, I've been informed that there could well be more than two states for a given cell (for instance available, unavailable, available in a given circumstance), in which case binding to a checkboxes checked value isnt going to be a lot of help. I've never used javascript or asp.net before and am unsure as to the best way to approach this problem. Ideally I could stick a data structure behind each cell which I could update to a certain state and then get my cell colour by binding to this - however I'm at something as a loss as how to best achieve this.

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• Should XML be used server-side, and JSON client-side?

  - by Michel Carroll

  As a personal project, I'm making an AJAX chatroom application using XML as a server-side storage, and JSON for client-side processing. Here's how it works: AJAX Request gets sent to PHP using GET (chat messages/logins/logouts) PHP fetches/modifies the XML file on the server PHP encodes the XML into JSON, and sends back JSON response Javascript handles JSON information (chat messages/logins/logouts) I want to eventually make this a larger-scale chatroom application. Therefore, I want to make sure it's fast and efficient. Was this a bad design choice? In this case, is switching between XML and JSON ok, or is there a better way?

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• launch an app to record keep with greasemonkey

  - by acidzombie24

  I have my greasemonkey script scanning every page i visit for a specific string. I would like to recordkeep the variations of the string in a sqlite db. I'll have another app process this db everyonce in a while. What i dont know is HOW do i store the data into the sqlite db? i was thinking i can launch an executable automatically if the string was found but i dont know how to do that through javascript. Another alternative i thought was have a socket listen on a certain port and have some js magic but i couldnt think of a silent way to send data like that.

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• Fade out text value inside of text field using jQuery

  - by Dwayne

  I am not entirely sure if this is possible or not, I am pretty knowledgeable when it comes to jQuery and JavaScript in general, but this one has me stumped. I've created a simple plugin that clears a text input on focus and then displays the default value if nothing has been entered. Is it possible to fade out just the text itself inside of the text input, and not the whole field itself? All attempts seem to result in the text field itself fading out and eventually hiding the element from view. I did come up with a solution of using spans containing the default value and absolutely positioning them over the text input, hiding and showing them depending if a user has entered any text or not. I would much rather a much straightforward approach if one exists.

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• Posting null values via AJAX

  - by nickf

  Using the jQuery $.post function, if you send a null value, it arrives at the server side as "null". Example: Javascript: $.post('test.php', { foo : null }); PHP: var_dump($_POST['foo']); // string(4) "null" I understand why this is so, but was wondering the best way to work around the limitation? Should you: Loop through all the variables in JS before you send them and replace with an empty string? Interpret "null" as null on the server side? Don't send the variable at all? Something else?

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• Hiding/Unhiding Control in Gridview’s column - shifting problem

  - by lupital

  This is a follow up to my previous question: link text In gridview's column i have a linkbutton and a label under it. I want to hide/unhide label when linkbutton is clicked. I use javascript because i don't want any postbacks. The code: protected void gvwComments_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton lButton = ((LinkButton)e.Row.Cells[2].FindControl("lbtnExpand")); Label label = ((Label)e.Row.Cells[2].FindControl("lblBody")); lButton.Attributes.Add("onclick", string.Format("HideLabel('{0}'); return false;", label.ClientID)); } } function HideLabel(button) { var rowObj = document.getElementById(button); if (rowObj.style.display == "none") { rowObj.style.display = "block"; } else { rowObj.style.display = "none"; } } The problem is that when I unhide the label by clicking on button, linkbutton is shifted a a bit upper it's original position in the cell. Is it possible to preserve linkbutton's position in the gridviews cell?

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• I can't change HTTP request header Content-Type value using jQuery

  - by Matt

  Hi I tried to override HTTP request header content by using jQuery's AJAX function. It looks like this $.ajax({ type : "POST", url : url, data : data, contentType: "application/x-www-form-urlencoded;charset=big5", beforeSend: function(xhr) { xhr.setRequestHeader("Accept-Charset","big5"); xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=big5"); }, success: function(rs) { target.html(rs); } }); Content-Type header is default to "application/x-www-form-urlencoded; charset=UTF-8", but it obviously I can't override its value no matter I use 'contentType' or 'beforeSend' approaches. Could anyone adivse me a hint that how do I or can I change the HTTP request's content-type value? thanks a lot. btw, is there any good documentation that I can study JavaScript's XMLHttpRequest's encoding handling?

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• Wrong image dimensions when it's dynamically loaded on a page the 1st time

  - by Nikita Barsukov

  I have the following piece of Javascript code on my web-page var central_image = document.createElement("img") central_image.setAttribute("src", imgs[curr_image_no - 1]); central_image.setAttribute("name", "jpeg"); document.getElementById("photo").appendChild(central_image); central_image.onload = getDimensions(); //function that alerts image dimensions Now, when the central_image is loaded for the 1st time in Firefox, its height always equals to 0. In IE its dimensions are 28 x 30 pixels. When I reload image, its dimensions are OK in both browsers. I guess the problem is that function getDimensions() starts before image was loaded completely. How to change that?

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• Firebug profiling issue: "no activity to profile"

  - by thermal7

  I want to try some different options with some javascript (jQuery) to see which is the fastest, however I can't get profiling working properly. Here is the code I want to test. $this.keypress(function(e) { console.profile("test"); //retrieve the charcode if possible, otherwise get the keycode k = e.which ? e.which : e.CharCode; if (blockKeyCodes.indexOf("|" + k + "|") != -1 || e.ctrlKey && k == 86) e.preventDefault(); console.profileEnd(); }); However, when I run this the console states "no activity to profile". If I use console.time the result is 0ms. Anyone know how to fix this?

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• Best Technologies for AJAX Web Development

  - by floatingfrisbee

  Hey Everyone, I have some experience in AJAX development, mostly on .NET and MooTools. However, I want to learn more and see what others out there thought about the various other options available. I am looking more for advise about the front end. The back end, I will most probably be coding up in .NET using c# and WCF services. Please feel free to provide me as much information as you can. Also I would appreciate any links to resources. List of Options (feel free to add) Write my own Javascript Use a frame work like MooTools, JQuery etc. Which one is better? Use Google Web Toolkit. Am I tying myself to limitations of GWT? Or are there not limitations? ASP.NET AJAX WPF (Will this run on non IE browsers?) Flash (it'll be a pain to learn action script) Thanks Jaspreet

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• Windows desktop gadget RSS Feed colour coding items

  - by padjo

  I have a desktop gadget that pulls RSS Feeds from a website. The Feed contains information about issues - ie. Priority, Time, Description. The Feed items are displayed on the desktop - however I need to colour code them according to their priority ie 1 = red etc. using the substr function - is there a better way to do this using JavaScript / HTML? At the moment I've hacked together this - but is there a more elegant solution? if (feed.item.description.substr(10,1) == "1") { document.write "<a href colour="red"" + item + ">"; else if (feed.item.description.substr(10,1) == "2") { document.write "<a href colour="yellow"" + item + ">"; else { document.write "<a href colour="green"" + item + ">";

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• Resolve URL's for ASP.NET in jQuery?

  - by TruMan1

  I would like to use "~/" and resolve on the client site. For example, I would want to do this: <a href="~/page.aspx">website link</a> <img src="~/page.aspx" /> I would have my base URL's in ASP.NET like this: <script type="text/javascript"> var baseUrl = "<%= ResolveUrl("~/") %>"; </script> Would I need a jQuery plugin for this or can this be a achieved with a chained command?

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• Online Code Coloring Service

  - by Sarfraz

  Hello, I would like to know if anyone knows of an online service where we paste the code and it generates back the colored html source code for that code. It could be PHP, HTML, CSS, Javascript, C, Java. Idea is that once i have the colored html code, i could easily put that in my wordpress.com blog. I know about [sourcecode language="whatever"] but just wanted to know an online service that supports multiple languages. The benefit is that, i can choose any color style/theme from that online service for my code. Thanks.

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• 2d parabolic projectile

  - by ndg

  I'm looking to create a basic Javascript implementation of a projectile that follows a parabolic arc (or something close to one) to arrive at a specific point. I'm not particularly well versed when it comes to complex mathematics and have spent days reading material on the problem. Unfortunately, seeing mathematical solutions is fairly useless to me. I'm ideally looking for pseudo code (or even existing example code) to try to get my head around it. Everything I find seems to only offer partial solutions to the problem. In practical terms, I'm looking to simulate the flight of an arrow from one location (the location of the bow) to another. It strikes me there are two distinct problems here: determining the position of interception between the projectile and a (moving) target, and then calculating the trajectory of the projectile. Any help would be greatly appreciated.

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• xslt dropdown problems

  - by Primetime

  I have a page with two drop down boxes created in a xslt. I am using onchange in both blocks to call a javascript function. If both drop downs are loaded on the page only the first drop down has a working onchange. I checked the view source code and it shows both onchange events. Does anyone have any idea how to fix this? ex: two drop downs, select first one, it refreshes, select second it does nothing, select first one and it still refreshes. code removed.

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• Adding CSS styles to injected DOM elements

  - by Nyxynyx

  I am using javascript to inject a few DOM elements into the page. I am able to inject a single DOM element and apply CSS style to it: var $e = $('<div id="header"></div>'); $('body').append($e); $e.css({ background: '#fbf7f7', }); Problem: If I have nested elements within $e, how can I apply CSS styles to the parents and its children seperately? var $e = $('<div id="header"><div class="header-content"><span class="title"></span></div></div>');

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• What are these lines doing?

  - by Montecristo

  I'm starting learning javascript for a project, I've found a script that does a part of what I need to do, I'd like to know how it works, both for me and in case it needs to be modified. Originally it was used inside the page, now I've put it in a file on its own and does not work anymore, so I'm dividing it in parts, because I fail to get the whole thing. Here is what bother me most for now: 1) Is this a declaration a function? What is its name? How can it be invoked? (function() { //some code })(); 2) No clue of what is going on here var VARIABLE = VARIABLE || {}; 3) Am I defining a the implementation of methodCall here? Something like overriding a method in Java? VARIABLE.methodCall = function(parameter) { console.log("parameter was: " + parameter); }; Thank you in advance for your help.

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