There are many important elements to successful, functional and dynamic web pages. In order to make sure that your web page is truly dynamic, you must have a working knowledge of a few elements such as JavaScript, XHTML, CSS, and DOM (Document Object Model). DHTML refers to Dynamic HTML, which is a combination of technologies that make a web page dynamic. Dynamic web pages mean having interactive forms, quizzes or games, or even something simple like a fly out navigation menu. DOM is the core of DHTML. DOM represents the HTML or XML of a web page. DOM or Document Object Models contains methods to dynamically generate web pages and manipulate elements. There are several different objects that belong to the category DOM, some of which are the DOM Document, DOM Elements, DOM Attributes, and DOM Events. DOM Elements represents the HTML element. The element consists of four different nodes; child nodes, element nodes, comment nodes, or text nodes. When you use the different methods for elements, they typically look like element.tagName or element.textContent. Element.tagName returns the tag name of an element. Element.textContent returns the text content of an element. The other common DOM Object is the Events Object. The Events object allows JavaScript to register different event handlers on elements in HTML. You will usually see functions combined with event objects. The function is called by the event handler. For example, an onClick event handler will call a specific function on the click of a button. An onMouseover event will call a function when the pointer or cursor rolls over the object, or hovers over the object. If the function is a fly out menu, then the menu will fly out when the mouse rolls over the object. DOM is very important for dynamic web functionality, mainly for using forms, interactive quizzes or games, and for animating static objects like images or menu items. DOM is also important for the functionality of JavaScript events like the onClick event handler. DOM is the core of DHTML, which is becoming more popular to use each year. DHTML is great for making dynamic and interactive web pages, which is a key element to creating a successful webpage.