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Stephen's JavaScript Blog July 2008 Archive

By Stephen Chapman, About.com Guide to JavaScript since 2004

JavaScript Hashing

Thursday July 31, 2008
You can use MD5 or SHA1 encryption with JavaScript One way encryption (or hashing) is possible with JavaScript. It is just not very useful since your visitors can always modify the ... Read More

Continuous Image Marquee

Tuesday July 29, 2008
There is no such thing as a marquee tag in HTML Having something scrolling across your web page all by itself is a behaviour of the web page and so should ... Read More

Adding a Map

Monday July 28, 2008
Google Maps can be added unobtrusively to a web page Once you have an API you can add Google Maps to any web page that is on the domain that you ... Read More

Ending Values

Sunday July 27, 2008
JavaScript can validate any part of the input field It isn't only the start of a text string that we can validate for being one of specific values. In the twelfth ... Read More

Plain Text Please

Saturday July 26, 2008
JavaScript requires a plain text editor One problem that a lot of people who are new to JavaScript have when following the instructions on how to copy someone's script onto their ... Read More

Javascript and JScript

Friday July 25, 2008
Most JavaScript can also run as JScript. JavaScript and JScript are two different programming languages. JavaScript runs in most web browsers with the most popularly used exception being Internet Explorer. JScript ... Read More

The Three Parts of JavaScript

Thursday July 24, 2008
JavaScript can be divided into three parts Different sets of standards apply to each of the three parts of JavaScript and support for the given standards for each part can vary ... Read More

onclick

Tuesday July 22, 2008
clicking on something is the most common way your visitors will run your JavaScript There are several different ways that an onclick event handler can be attached into your web ... Read More

Google Maps - Get an API

Monday July 21, 2008
The Google Maps service uses JavaScript to define what map appears on the page The easiest way of adding a map to any web site is to use the ones provided ... Read More

Starting Values

Sunday July 20, 2008
What does it start with? In the eleventh form validation tutorial we look at how we can test that a field starts with one of a specific set of values. Starting Values

Numbers to Words

Saturday July 19, 2008
Convert numbers to Words with JavaScript. JavaScript does an excellent job of being able to manipulate numbers and even provides some quite advanced mathematical functions. What happens though when you want ... Read More

Convert to Roman Numerals

Friday July 18, 2008
JavaScript can display the answer in roman numerals Sometimes displaying a number on your web page as a normal number just doesn't look right. Sometimes it may be more appropriate to ... Read More

Formatting Numbers

Thursday July 17, 2008
The format JavaScript wants to work with isn't always the same as the format you want to display the result in. To be able to process numbers in JavaScript they must ... Read More

Unobtrusive Add to Favourites

Tuesday July 15, 2008
JavaScript can add to the page when a feature is supported and not add when it isn't. Having an "Add to Favourites" link is popular with people just starting out writing ... Read More

Minimum and Maximum Distance

Sunday July 13, 2008
How far apart are specific characters? Find out with JavaScript Continuing with our look at validating text input fields using JavaScript, the tenth tutorial in the form validation series looks at ... Read More

Choosing Prebuilt Scripts

Saturday July 12, 2008
You don't need to learn JavaScript to be able to use it. There are lots of places on the web where you can obtain JavaScripts that have already been written and ... Read More

Inline Tooltips

Friday July 11, 2008
JavaScript can update the information in the page to explain what your visitors don't understand Some people prefer that additional details about a term or link on their web page be ... Read More

Javascript and XHTML

Thursday July 10, 2008
You can embed JavaScript into XHTML if you absolutely must XHTML treats embedded Javascript code slightly differently from the way HTML does. You need a small piece of extra code to ... Read More

Popups and Blockers

Tuesday July 8, 2008
Reduce the chance of your JavaScript popup windows getting blocked. All browsers now come with a popup blocker to block popup windows opened automatically by JavaScript. Unfortunately some are not as ... Read More

Referencing Form Fields

Thursday July 3, 2008
Form field names are used to pass the information to the server The names that you give to the fields in your form in order for the server side processing to ... Read More

location Reference

Tuesday July 1, 2008
JavaScript can interact with the address of the current page The location object provides JavaScript with not only access to read the various pieces of information from the current page address ... Read More
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