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DHTML

Dynamic HTML, or DHTML, is essentially a combination of HTML, JavaScript, and CSS. It is this group of technologies, when put together; They allow us to create a dynamic HTML web page, they give the basic structure to the web page, while JavaScript gives the power to manipulate the data and CSS allows us to define the presentation and style of the document. DHTML is also the effect of various integrated browsers for tures in fourth generation browser. The ability that makes web pages more interactive is not a scripting language like JavaScript; in fact, for some outsiders, it’s the browser enhancement that results in some dynamic features. Browsers like the Netscape browser and Internet Explorer have their own implementation of DHTML, so it is not possible to write a single DHTML code and expect it to work correctly in both browsers. In this chapter, we will look at the DHTML implementation for these two browsers separately.

DHTML BROWSER AT NET SCALE

To bring out a powerful effect, Netscape uses the layer tag. Using the layer, you can place objects anywhere in the processing of search engine optimization and the page designed for the web. The basic syntax of the layer tag is very simple.

The layer tag is a content tag, which means you can add content to it, such as text or HTML tags. You can define simple content within a layer or, by using JavaScript, you can have them move or hide. When viewed, one layer floats over other text on the page giving a similar appearance.
The layer is essential to follow the parent-child relationship while displaying information. You can insert one layer into another; that is, you can create a parent or parent layer and place child layers or other inline layers within it.

Absolute layer positioning

Positioned layers are created using . A layer alone can’t give you much of a dynamic effect; layer attributes do the trick. Layers support attributes that allow you to position them using x,y coordinates. You can give layers a background, or make sure they are only visible, or hide them entirely.

The attribute ID is used to give the layer a name. The use of id is very useful when manipulating layers using scripts. The left and top attributes specify the position of the layer in terms of pixel distance. While using HEIGHT and WIDTH, it’s important to know that if you don’t use the width attribute, the default layer will be as wide as possible, as a result your web page layout may look very different. On the other hand, if you don’t use the height attribute, your layer won’t be lopsided, since it will only take on the height of the content. And BGCOLOR will of course give your layer a background color.