Lee Underwood

One of the biggest problems many people have in setting up a Web site is creating the cascading style sheets (CSS). The proper method for designing a good site is to use HTML for structuring the pages and CSS for styling the content on the pages, but what if you don’t know how to create […]

When we think of HTML coding, we tend to think of elements (“tags”) used to structure a Web page. There are elements that define the body of the page, others to define paragraphs and still others for emphasizing text. It’s unusual to think about visualizing the code; our interest is usually focused on the appearance […]

One of the things that we can do with JavaScript is display and manipulate the date and time. This can be useful in many ways, such as calculating the days between dates, showing new items on your Web site and calculating shipping dates. In this installment we’ll take a look at the JavaScript Date() object […]

The Math object is a predefined JavaScript object used to perform mathematical operations. It’s also used to obtain the values of predefined mathematical constants, i.e., Pi (π) or the square root of a number. In addition, it can also be used to generate random numbers. It’s important to remember that the Math object begins with […]

Now that we know about the different types of arrays, we’ll learn how to manipulate them in order to make them more functional. In this section, we’ll look at the properties and methods that are commonly used for most coding situations. Array Properties length The length property returns the number of elements in an array. […]

This week we look at what happens with multidimensional and associative arrays. As you look at these you will start to understand where you can use JavaScript when building your Web sites. Multidimensional Arrays This type of an array is similar to parallel arrays. In a multidimensional array, instead of creating two or more arrays […]

In this installment we are going to take a look at JavaScript arrays. This is a process of study that will span several installments because arrays can be very useful in creating different types of scripts. At first they can be somewhat confusing but in time they become easier to understand. JavaScript Arrays An array […]

There are four objects that provide information about the environment of the user’s system. They belong to the window object: navigator, screen, history and location. These objects are used to obtain information such as screen size and resolution, color depth of the monitor, limited information on the browser history, and the URL. In addition, information […]

In our last two sections we looked at properties and methods of the window object. In this installment, we’ll wrap up our study of the window object by learning how to use the most common of the window event handlers. We’ll also take a look at some links for additional help. Window Object Event Handlers […]

In this installment we are going to take a look at the methods that are associated with the window object. Here we will look at what they are and how they work. Later on in this series we will work with them in greater detail. Until now, we’ve been learning how to build the framework […]

In our last installment we began our study of objects by looking at how to create custom-made objects using the Object() constructor. We will continue that study by taking a look at browser-based objects. While there are several browser-specific objects, we will concentrate on the more common objects that are compatible with most browsers. Review […]

This week we are going to go a little deeper into our study, a process that will last for several weeks. I want to make sure you fully grasp this subject as it’s a very important topic, but it can be challenging to understand in the beginning. Take your time, read carefully, and contemplate what […]