Click here to Skip to main content

Submit your article

Javascript

Javascript

Great Reads

Property Finder - a Cross-Platform HTML5 Mobile App

by Colin Eberhardt

This article describes the development of a cross-platform HTML5 application for Windows Phone and iPhone.

AJAX-enabled Name Selector User Control

by Steve Krile

Fully AJAX-enabled user control used to select names from a database in a drop-down format.

Greg The Robot - Game Dev with TypeScript

by Marcelo Ricardo de Oliveira

A shoot'n'up HTML5 game made with Phaser game framework

The Math behind Neural Networks: Part 1 - The Rosenblatt Perceptron

by Serge Desmedt

A try it yourself guide to the basic math behind perceptrons

Latest Articles

MathML to/from Plain Text Converter

by Xavier Junqué i de Fortuny

Converts MathML coded string to/from plain text string

A JavaScript Form Generator

by Member 4206974

FormGen, a JavaScript Form Generator

A Unique Identifier Usable Across Disconnected Systems

by Jeremy Falcon

Just a simple routine and helper routine to generate unique IDs suitable for disconnected systems.

Creating a LLM Chat Module for CodeProject.AI Server

by Matthew Dennis

Create a ChatGPT-like AI module for CodeProject.AI Server that handles a long-running process.

All Articles

Javascript

How do I add text when I hover over my markers on Google maps?

4 Mar 2018 by !DOCTYPE html

I've been trying to have a tag occur when I hover over each of the markers on this map, describing what Is here and why to visit these places, but I don't know how. Does anybody know how to make this happen? What I have tried: This is what I've been working with. Since I don't know hot to make...

If/else not working! PLZ HALP!

5 Jul 2018 by !DOCTYPE html

Hi! So I came across a problem in the JS code below. My if/else statement will only show the oeramiter for "If", even when I put in 123456. var age = ""; window.prompt("How old are you?", 50); if (age

How to make a for or while nested loop patern

5 Jul 2018 by !DOCTYPE html

Hi! So i have been trying to create the pattern below using nested for or while loops, however my code does not seem to put out what I need. In fact, It displays nothing! Pattern: * ** *** **** ***** ****** ******* ****** ***** **** *** ** * Below is the code I have been trying out. What I...

code for freeze panes in CSS file which can be used in SAS Enterprise Guide

1 Feb 2010 by #realJSOP

Don't know anything about that.

Problem with Javascript Tree

29 Apr 2010 by #realJSOP

Go to the article where you want to ask the question. Each article has it's own message group. I'm deleting this question.

How to get the value which generated by javascript in C# Winform program?

12 May 2010 by #realJSOP

Well, if your div's ID is "position" (and your tags are properly closed in the HTML), you should be able to use content.InnerHtml to retrieve everything inside the div.At that point (according to your piss-poor description), you can simply call string.Split(',') on the "inner html" and...

unable to export to excel

19 May 2010 by #realJSOP

Put a try/catch block around it and ru it under the debugger to see exactly what the error is. At that point, you should be able to figure it out.

Reading Excel sheet via JavaScript, repost #2

10 Jun 2010 by #realJSOP

I googled it, and found this:function mytest1() { var Excel, Book; // Declare the variables Excel = new ActiveXObject("Excel.Application"); // Create the Excel application object. Excel.Visible = false; // Make Excel invisible. Book = Excel.Workbooks.Add() //...

Reading Excel sheet via JavaScript, repost #1

11 Jun 2010 by #realJSOP

I'm deleting this version because it's a repost.

Efficient Way to Crawl through Web Sites or Better Way to Download WebSite Content

17 Jun 2010 by #realJSOP

You have more control over what's happening with method #2. That's the one I would choose. However, don't forget to add the requisite try/catch/finally block to handle any exceptions that might occur.

about end-to-end blackberry application

26 Jun 2010 by #realJSOP

I know, it\'s tempting to be a lazy git instead of just looking around or even - GAK! - search the site, so here\'s the FAQ for submitting articles. Make sure your read THE WHOLE THING.Code Project Article FAQ[

Close Firefox from javascript

27 Aug 2010 by #realJSOP

A little google goes a long way:Close

Can we compare two javascript files using C#?

27 Sep 2010 by #realJSOP

So read both files into separate strings, remove all of the spaces, tabs, and any other unprintable ascii character, and THEN compare the strings.

Validate radio group

23 Nov 2010 by #realJSOP

Instead of doing that, set a radio item in the group as selected and the need to validate whether or not a radio button is checked is eliminated. If you have to, add a radio button that reads "Not selected", or somethig appropriate, and select it by default.

error in line that doesn't exist in code

24 Nov 2010 by #realJSOP

I think when you get a javascript error, it also counts the lines in the hosting html file. Of course I could be wrong...

Consume a WCF Service Without using References and svcutil

6 Dec 2010 by #realJSOP

You can't. You either need the service reference, or you need to use svcutil to generate the appropriate files for you. It sounds like you're trying to use a web service without permission from its owner.

regex to find Javascript functions

6 Dec 2010 by #realJSOP

If you're using .Net, you can probably load the javascript into a BrowserWindow, and then use the DOM to extract the method names (let the DOM do the parsing for you). How you would specifically go about doing this, I leave to you as a programming exercise.

regular-expression

start to built a college management web applecation by asp.net

12 Dec 2010 by #realJSOP

My tip: Google is your friend.If you're a "beginner in asp.net", one really has to question the logic of assigning you the task of developing an enterprise-level web application. If I was in charge, I certainly wouldn't want a "beginner" to be involved at the level you're involved.

Call Back to server

7 Jan 2011 by #realJSOP

Does this article help?http://ajaxpatterns.org/archive/Timeout.php[^]

How to code an interactive shirt Designer

28 Jan 2011 by #realJSOP

Oh yeah - like we're going to help you copy someone else's intellectual property...

Unknown Runtime Error on I.E. but not on Firefox

18 Feb 2011 by #realJSOP

When I googled this, I saw conflicting reports of it working fine in IE but not in Firefox, and then working fine in Firefox, but not IE. I think you're just going to have to break down and google it yourself because you know more about what your page is doing than we ever could. You also...

Replace Zero instead of NaN...............

8 Mar 2011 by #realJSOP

The problem is that you're trying to use them as if there's a valid numeric value in them. Before trying to use the values in those fields, check to see if they're NaN, and only then, do the desired math operations. In fact, I'd do this:var TxtSTUPort =...

Convert aspx page in to html using C#

12 Mar 2011 by #realJSOP

Try using HttpWebRequest instead. You have a lot more control over how it works than you do with WebRequest.

What is an alternative to javascript onmousover / CSS:hover for mobile devices that have no mouse?

16 Mar 2011 by #realJSOP

OnFingerHover? :)I think I'd go with option 3, except you made it a point to say "some" devices, as if to say *some* device DON'T have suppport (or excellent support) for it.BTW, Liquid Nitrogen is in short supply because of the Tsunami in Japan.

how i can cll method c# from Javascript

6 Apr 2011 by #realJSOP

You can't directly call a code-behind method from javascript because that would be crossing the client side/server side boundary. I would think a workaround would be to set a hidden form variable to inidcate what method you want to call (in the event that there are more than one), and then call...

where to place script in contentplace Holder

14 Apr 2011 by #realJSOP

I bet it's having a problem with document.getElementById (because javascript is client side, and the aspx page is server side?). Try putting the script into the section of the masterpage.

Web Image Window - What's That Called?

21 Apr 2011 by #realJSOP

Situation: You're on a web page with a small image displayed, and when you click on the image, the current browser window contents are "grayed out", and a window animates itself onto the screen to show the image in its actual size. The window has a Close button on it. I assume it's done in...

[SOLVED] Lightbox2 and its ilk

23 Apr 2011 by #realJSOP

Using FireFox 4.0:I was playing around with Lightbox2 last night, and I simply can't get it to load the control images (like loading.gif or closelabel.gif), even if they're in the same folder as the javascript. The applicable part of my site hierarchy looks like this:root Lightbox...

[SOLVED] Lightbox2 and its ilk

23 Apr 2011 by #realJSOP

Well, after fighting with lightbox2 some more, I decided to try shadowbox, and it worked as advertised without any changes, so I switched to that. Once complaint about shadowbox - it appears as if some sort of obfuscation has been applied because all of the variables and method names are...

Need a idea for a program to help my resume

29 Apr 2011 by #realJSOP

One program isn't going to bolster your resume. What got me my first programming job was that I not only attended school full time (I also have a certificate, and not a degree), but that I also held down a full-time job. Yeah, your first programming gig is gonna suck as far as compensation goes,...

What permission level is required by IE to run advanced Javascript? I want to know the minimum permission level which is required to run the script.

3 May 2011 by #realJSOP

There's no such thing as a minimum protection level. Javascript can be turned off all by itself, the creating a "custom" protection level.The best you can do is detect whether or not Javascript is enabled, and put up the appropriate web page or other indication informing the user that...

Getting absolute path with JavaScript

5 May 2011 by #realJSOP

This is what I use on my web page:function GetSiteRoot(){ var rootPath = window.location.protocol + "//" + window.location.host + "/"; if (window.location.hostname == "localhost") { var path = window.location.pathname; if (path.indexOf("/") == 0) ...

How to get the serial number of the hard disk of the client system using javascript?

17 May 2011 by #realJSOP

You can use WMI.I found this with a google search:http://www.htmlforums.com/client-side-scripting/t-using-wmi-with-javascript-123787.html[^]that returned over 920,000 results using this search phrasejavascript wmi[^]

how to find filepath using asp.net

22 May 2011 by #realJSOP

Here's a CodeProject article.File Search using Javascript[^]

Reload Parent Page when child modal form is close ?

14 Jun 2011 by #realJSOP

In your asp.net page (assuming you're using asp.net, because you didn't say whether you were or not), in the Page_Load event handler, do something like this:if (IsPostback){ if (credentials are valid) { Response.Redirect("authenticated_home_page.aspx"); }}

Script to associate cover art to a video file.

23 Jun 2011 by #realJSOP

If you want to pay someone to do work for you, there are sites on the internet that allow you to hire programmers. This is not such a site.Now, if you want to stop pussyfooting around and use real software on real hardware, try MediaPortal. It's free, runs on Windows, and it comes with...

Horizantal Drop Down Menu Resources ?

30 Jun 2011 by #realJSOP

I use transmenu, but it's no longer being maintained. It's a javascript menu system. You can see an example of it here:My web site[^]You can get the last updated source here:http://youngpup.net/projects/transmenus/[^]It's also used in Joomla and DotNetPuke.

this.initUnits("weeks") is not considered as a function in mozilla firefox

7 Jul 2011 by #realJSOP

Have you tried typing the entire name - cTimeLine.prototype.initUnits?

Code of the "Online tutor " project?

8 Jul 2011 by #realJSOP

This should explain it[^]

CSS templates for developing ebay website

11 Jul 2011 by #realJSOP

No. We can't give you the templates because we don't have them. If they put their templates info files, you may be able to get to them by viewing the source of the ebay web page, finding the file names in the section, and then browsing directly to those files. No guarantees that's gonna...

How do i use JavaScript Code in SSIS?

20 Jul 2011 by #realJSOP

A google search would have done you a world of good.I found this[^] when I googled "ssis javascript".

How to retrieve table from sql and display in html "table"

26 Jul 2011 by #realJSOP

One of these methods:0) You need another javascript function that can fetch a row from the returned datatable, and then build/return a string that represents the html table row. You would need to make your datatable global.1) Write another method that accepts a datarow, and then...

I want to b web designer?

27 Jul 2011 by #realJSOP

You need to learn how to spell complete words.

Get Previous page URL from Javascript

26 Jul 2011 by #realJSOP

Try this:document.referrer

this.src is not working to change the image source ?

28 Jul 2011 by #realJSOP

You're trying to use javascript events to run asp.net code-behind. You can't do that. Try writing some javascript code to do it.

New Programmer- Can't Find the Scripting On A Select Box

7 Aug 2011 by #realJSOP

Is this an asp.net web site? Is it using ajax?EDIT ================You didn't answer my question, but okay.See if you have any .js files in your site folder, and look for anything that looks like initialization of a dropdown list. Failing that, start at "the search" that gets...

How we will call c# function from java script function.

8 Aug 2011 by #realJSOP

One way:Add a hidden asp:Button to your aspx page (don't forget to add a click handler in your code behind), and from your javascript, just call the button's click method:var button = document.getElementByID("buttonID"); button.click(); Your click handler code can then call the...

java script function not work in mozila

9 Aug 2011 by #realJSOP

obj = obj || window.event;How can that possibly do anything useful?

Rich Textbox in ASP.net

9 Aug 2011 by #realJSOP

Depending on the browser, you already get that kind of functionality (Firefox already does it). Also, there are probably plugins for the browser that don't support it natively. Why would you want to duplicate that functionality in your code?A little googling goes a long way:Go here [^]

Is there any methods are available in javascript

9 Aug 2011 by #realJSOP

You couldn't find this answer with google? Look into toUpperCase().var mystring = "abc";mystring = mystring.toUpperCase();

How to check a character in javascript

10 Aug 2011 by #realJSOP

One way is to do this:string a = "a";if (a == a.toUpperCase()){ // it's uppercase}Another way is with regular expressions:var check = /[:upper:]/;alert(check.test("R")); // returns truealert(check.test("r")); // returns false

How to create an integer array in javascript

10 Aug 2011 by #realJSOP

For god's sake, learn how to use google. EVERY one of your recent questions can easily be answered with even the most rudimentary of google searches.

Problem logging in programatically to a website using WebBrowser Control

12 Aug 2011 by #realJSOP

Use Fiddler [^] to figure out what the site is doing. That's what I do in a case like this.

WebBrowserControl

Why we often add script or style in head tag

12 Aug 2011 by #realJSOP

For Style tags, the HTML standard says they go there. For script tags, it depends on the script and its function. If you're loading a .js file, it goes in the head section. If you want the code to execute as part of the rendered page and it doesn't live in a method, and if we're talking about...

How to open a new window with url using javascript...?

19 Aug 2011 by #realJSOP

window.open('h...

request for an application

23 Aug 2011 by #realJSOP

Try Monster [^]. There are hundreds, nay, thousands of qualifed developers there looking for gainful employment. You would probably need to log on as an employer.

Any suggestions for improvement or content?

24 Aug 2011 by #realJSOP

Epic fail.This essentially qualifies as spam.

Calling Javascript from WebService

25 Aug 2011 by #realJSOP

This might help, but no guarantees:http://nishantrana.wordpress.com/2008/08/13/consuming-an-aspnet-web-service-using-soap-protocol-from-javascript/[^]

opener.document.getElementById is not working in IE8

26 Aug 2011 by #realJSOP

In IE8 Standards Mode (as opposed to Compatibility Mode) the getElementById method is case sensitive. Is your ID name the right case? Should it be "ID", or maybe "Id"?

finding area,perimeter by coordinates

7 Sep 2011 by #realJSOP

Define "irrelevant data". With three or more points, it's impossible to have "irrelvant data". You can still calculate the area of the resulting shape by either considering the points in the order specified, or by "normalizing" the points so that the resulting shape is a closed-plane polygon.

Call HTML onclick functions

8 Nov 2011 by #realJSOP

The onclick function you're trying to executre is a javascript function. If you were to use Wireshark to analyze what the page does when the user clicks abutton, you will be able to figure out the correct querystring to pass to make the right things happen. BTW, wireshark is a free tool, and...

how to change oauth1.0 to oauth 2.0 of facebook login

12 Dec 2011 by #realJSOP

Have you considered asking FarceBook Developer Relations how to do it?

How to write in javascript for 20-character random generator

16 Dec 2011 by #realJSOP

if you can create GUIDs in javascript, just do that, and remove the hypens and curly braces if necessary. I found this with google:function createUUID() { // http://www.ietf.org/rfc/rfc4122.txt var s = []; var hexDigits = "0123456789abcdef"; for (var i = 0; i

how to send "/"query string

18 Dec 2011 by #realJSOP

Just change the "/" to "%2f".mystring = mystring.replace("/", "%2f");

Urgent please help me.Javascript

23 Dec 2011 by #realJSOP

Did you mean to do this:

Disable Browser back button and Call Javascript function on browser back button click event

7 Mar 2012 by #realJSOP

javascript:window.history.forward(1);Of course, if javascript is turned off in the client browser, the code above won't work. So, you'd probably have to check the referrer and redirect if necessary to the referring web page.

WPF WebBrowser Control and Javascript

15 Jun 2012 by #realJSOP

One way to get around the "invalid character" error

How to one checkbox selected and another checkbox disabled in list view inside ?

29 Sep 2016 by #realJSOP

I'm gonna take a stab at this, despite your inability to communicate clearly in English.You need to hand the click event for the checkboxes in the list, and determine if the checkbox is checked or unchecked, and take the appropriate action.Now I remember why I stopped answering questions...

Mvc C# invalid character

8 Nov 2016 by #realJSOP

Delete the semi-colon after the curly brace

How to use C# webbrowser control to select from dropdowns and invoke submit script

23 Jan 2017 by #realJSOP

You don't need to select controls. You simply need to know the proper url/querystring format/contents, and submit that with the WebClient object.

WebBrowserControl

How do i...is it possible to run HTML with javascript on C# windows forms(visual studio)?

11 Feb 2018 by #realJSOP

Yes, you can actually host a web page in your own application. I did it in this Codeproject article: CodeProject Article Scraper, Revisited[^] Scroll down to the section labeled "Visual Presentation".

How do job websites(naukri, monsterjob etc) manage applicants documents ?

27 Feb 2018 by #realJSOP

I wouldn't worry about maintaining an archive of older files unless that's a specific requirement. If it is, you can establish a max number of old files to maintain to keep disk usage on the file system server to a dull roar. Files can quickly overwhelm available disk space on a busy site. You...

Use javascript variable in razor: "name 'I' does not exist in the current context"

16 Mar 2018 by #realJSOP

First, why are you worried about the index of the item you're editing? Seems weird given the nature of EditFor. Don't do it on the client side. Do it this way: @foreach(var item in Model) { @* if you really need the index, you can do this in a foreach loop *@ int index =...

Alignment is not working properly from external javascript file

28 Oct 2018 by #realJSOP

Pad the minutes and seconds values with a leading 0 if they're less than 10. 09 mins : 09 secs It also seems to me that if you simply displayed the time remaining without any words, it would still be completely readable (and you could include hours, even if you never need the value: Time...

Looking for a better way to remove role with button ASP.NET MVC

4 Apr 2019 by #realJSOP

(The way I'd do it) Instead of having two buttons, use a checkbox to indicate whether the user does or does not have the role, and have a single submit button.

Cross-browser alternative needed for activexobject javascript

17 Apr 2019 by #realJSOP

DO NOT USE ACTIVEX. (Commonly referred to as "Active-Xcrement") Only Microsoft browsers support it, and anyone with have a brain avoids using it because it's insecure. There are too many examples of writing ADO code for an Asp.Net web site to have to use ActiveX.

Prevent multiple tabs

13 Jun 2019 by #realJSOP

"prevent multiple tabs in browser of a given web site" - Google Search[^]

Dynamically load data in javascript

19 Jun 2019 by #realJSOP

If it were me, I'd establish files with static names, and copy the newest files (that the python script generates) to files with the static names. At that point, you simply load the same file names every time, which completelty eliminates the need to scan the folder.

Can anyone explain this code......?

17 Oct 2019 by #realJSOP

comparedTo is a function contained in the BigNumber object. You have to look at the source code for that object to find it.

How do I make a download link open in a new browser tab when clicked and set a countdown on that tab before the file download link appears

8 Nov 2019 by #realJSOP

0) The delay does not go on the page where the user clicked the link - it goes on the page that has the download button. 1) To make a link open in a new tab, add target="_top" to the href. 2) You should respond to an event in order for the html to be rendered. 3) For the record, these...

How to access geolocation coordinates in aspx.cs?

21 Dec 2019 by #realJSOP

This article might help: A Handy GPS Class [^]

Chart.js line chart, one dataset, set line color based on Y value. How?

29 May 2020 by #realJSOP

Once the line color is set in a line chart, you can't change it based on the value of a data point. No chart library that I'm aware of is going to let you do it. You have two options: 0) create another line (a different color from your data...

How to pass record from table to partial view

7 Feb 2022 by #realJSOP

There's at least one article here n CP that describes some methods for doing this: Different Ways to Pass Data to Partial View[^]

How do I add functionality to react class

2 Feb 2023 by #realJSOP

I'm using MaterialTable, and I want to add some functionality. This new functionality does not necessarily override default functionality. How can I do that? What I have tried: This is one of the few things I can't find anything about on Google.

Convert XML string to Array

24 Sep 2013 by $*Developer - Vaibhav*$

Hi All, Convert XML string to Array but array is array item within item 1 SDM SDM78@gmail.com #4169e1 10010000 XYZ...

Convert XML string to Array

25 Sep 2013 by $*Developer - Vaibhav*$

Using parseJSONvar obj = jQuery.parseJSON( '{ "name": "John" }' );alert( obj.name === "John" );

How to call java scrip on button click

6 Dec 2016 by $*Developer - Vaibhav*$

[How to Call javascript function on button click event]

How to Clear the Browser History using JavaScript

24 Oct 2011 by $aikumar$ Cilamkoti

Hi All,I just want to Clear the History of the Browser using the Javascript...any suggestion please welcome,in other words just want to disable the Back button of the browser..

How Do I Get Ip From Client Machine

26 May 2014 by $ultaNn

I tried below codes to get IP from client machine but fail to get the appropriate IP CODE1Using this code i am getting IP 100.43.0.212of my server where i have uploaded my website private void IPAddress() { IPHostEntry host; string localIP =...

Calculate time period between two hijri dates

21 Dec 2021 by $ultaNn

Please can anyone provide a method to calculate the difference between 2 hijri dates start date 01/10/1429 End Datem 04/23/1436 Output 7Y 3M 14D What I have tried: function CalculateDate() { var startDate =...

Calculate time period between two dates but all the calendar day must be 30

17 Mar 2022 by $ultaNn

I have to calculate number of days between two dates but every month is of 30 30 x 12 = 360 , What I have tried: function diff_year_month_day(dt1, dt2) { var time =(dt2.getTime() - dt1.getTime()) / 1000; var year =...

I want print dialog without HTML page javascript

22 Jan 2023 by $ultaNn

i am trying below code to print only from javascript without html popup page var a = window.open('', 'PRINT', 'height=900,width=600'); a.document.write(''); a.document.write( '' + ...

SearchLite

23 May 2002 by 'Anil' Radhakrishna

search multiple sites at once

4 Jul 2002 by 'Anil' Radhakrishna

Search multiple sites at once and view results on a single page

Using popup windows to send server information back to the client

2 Jul 2002 by 'Anil' Radhakrishna

A Frill-free way to submit Forms and Parent-Child window communication

Slide Show

4 Jul 2002 by 'Anil' Radhakrishna

Fun with Frames

Creating a Dynamic Combo Box w/o Refreshing Page

30 Jul 2003 by 'Anil' Radhakrishna

..using IFRAME.

Slide Show - New, Improved

21 Mar 2003 by 'Anil' Radhakrishna

Mimics PowerPoint functionality & can be used for short text messages

Client-side paging with jQuery

25 Jul 2011 by 'Anil' Radhakrishna

A mash-up of sorts built using Microsoft's jQuery Template plugin along with G Birke's jQuery Pagination plugin & a photo-stream from Flickr acting as a data source