JavaScript uses up to three equals signs next to one another. JavaScript uses the equals sign for assigning values to fields as well as for comparing fields. This tutorial covers what ... Read More

JavaScript can bring order out of chaos Sometimes you want your visitors to select several entries from a list, perhaps even all of the entries in the list, and you need ... Read More

Movement doesn't just have to be horizontal or vertical it can be both at the same time. Objects can move in more directions than just horizontally and vertically. In the thirteenth ... Read More

Often a simple change to a script offers more opportunities. With this JavaScript I have made a slight modification to my ideas machine JavaScript so that the random idea that is ... Read More

You don't need to create every object from scratch. When you base one object on another object everything in the original object is also available in the new object including what ... Read More

Removing HTML from a web page using the DOM is the easiest way to update the page. So far in examining how to use the DOM the tutorials have concentrated mostly ... Read More

JavaScript please tell me what page I am on If you link the same external JavaScript into more than one of the pages on your site then there may be times ... Read More

JavaScript can generate both fade and wipe effects when replacing one image with another. Creating a transition effect when swapping one image for another is trivial in JScript where Internet Explorer ... Read More

Add max and min methods to your JavaScript arrays to make it easier to locate the smallest and largest values in the array. With JavaScript we are not limited to the ... Read More

JavaScript can do things on the web page that do not have a parallel in the real world. It may be contrary to the laws of physics and so can't happen ... Read More

JavaScript doesn't have a command for deleting cookies. Usually when you create a cookie you either make it a session cookie (which is automatically deleted when the browser is closed) ... Read More

JavaScript objects can share methods While each object you create in JavaScript will need its own properties in order to store the state of the object, in most cases having separate ... Read More

When JavaScript doesn't provide the function we need we can always add our own. One advantage of the JavaScript language is that you can extend the language to add your own ... Read More

JavaScript can reformat your visitor's input It is much friendlier to your visitors if you allow them to format the numbers, currency values, phone numbers etc in whatever format they prefer. ... Read More

JavaScript can help you test your web pages. Not everyone using the web has a browser that can display images and some people just prefer to turn images off in their ... Read More

Some people try to use JavaScript for really pointless tasks No right click scripts don't prevent people from viewing your page source, they just annoy your legitimate visitors who like to ... Read More

You can change directions when moving objects with JavaScript So far all the objects we have moved have gone to where we sent them and then stopped with no further animation ... Read More

JavaScript regular expressions work similar to regular expressions in other languages. A book doesn't have to be only about JavaScript in order for it to have value to those writing JavaScript. ... Read More

Some words have special meanings when used with objects - :this" is one of them. In the seventh tutorial on Object Oriented JavaScript we look at how you can use "this" ... Read More

JavaScript can access collections of any HTML tag within the web page. Now that we have considered some older but still useful methods of accessing and updating information in a web ... Read More

You don't have to pay for JavaScript code, there is always a free version around somewhere One script that seems to be a popular item for internet marketers to try to ... Read More

There are two methods that all JavaScript objects have. Every object that you define in JavaScript has at least two methods available - valueOf() and toString(). These methods will return a ... Read More

Dynamically update dropdown lists based on other dropdowns using JavaScript Updating a second dropdown's content based on a user selection in a first dropdown is a common requirement. Of course having ... Read More

JavaScript can control how fast things move on your web page. Depending on just what it is that you want to have moving around on your web page you may want ... Read More

JavaScript doesn't get everything right. One of the things that JavaScript gets wrong is modulo arithmatic where for any positive modulo number the possible values should be between zero and one ... Read More

JavaScript doesn't limit you to using the objects that it defines, you can also create your own. JavaScript provides several different ways to define new objects, Here we look at one ... Read More

JavaScript has a simple way of interacting with HTML In the sixth Document Object Model tutorial we look at the simplest way of referencing the content of your web page is ... Read More

HTML doesn't provide a way to enter numbers so JavaScript needs to convert them from text JavaScript provides so many different ways to convert text strings to numbers that there will ... Read More

JavaScript can provide advanced text manipulation. One problem with splitting text across multiple lines in JavaScript is how to avoid splitting the line in the middle of a word. This function ... Read More

JavaScript can easily retrieve useless information about the computer screen as well as more useful information about the size of their browser window Not all of your visitors will use the ... Read More

Web pages are two dimensional When we place objects on our web page to be animated with Javascript we are not limited to just having them move from side to side. ... Read More