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DHTML

Dynamic HTML, or DHTML, is essentially a mixture of HTML, JavaScript and css. It is this set of technologies, when brought together; allow us to make a dynamic web page HTML, gives 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 too the effect of more than a few built-in browsers for tures in forth generation browser. It is the capability that makes web pages more interactive is not a scripting language like JavaScript; in fact to some externt it is browser enhancement that results into some dynamic features. Browser like Netscape navigator and internet Explorer have their own implementation of DHTML.Therefore, it is not possible to write a single DHTML code and expect it to function in both of these browsers properly. In this chapter we will look into the DHTML implementation for these two browsers separately.

DHTML IN NET SCALE NAVIGATOR

the bring out a powerful effect, Netscape uses the layer tag. Using the layer tag you can place objects anywhere on search engine optimization and web designed page .The basic grammar of the layer tag is very easy.

The layer tag is a content tag, which means you can add content into it, like text or HTML tags. You can define easy content within a layer or by using JavaScript you can make them move or hide. When you view a layer floats above other text in the page giving like appearance.

Layer essential follow the parent child relationship while displaying information. You can insert one layer into another; that is, you can make a parent or a main layer and within it place child or other can be inline layers.

Absolute positioning of layers

Positioned layers are created using the .A layer by itself cannot give you much dynamic effect; the attributes of the layer do the trick Layers hold up attributes that let you to position them using the x,y coordinates. You be able to provide layers a background, or create only sure are able to be seen or hide it completely.

The attribute ID is used to give the layer a name .Using id is very useful when you manipulated layers using scripting the left and top attributes specify the position of the layer in conditions of pixel diustance.While using the HEIGHT and WIDTH it is significant to recognize that if you do not use the width attribute then the layer by default will be as likely as a result your Web page design might turn out very different. On the additional hand, if you do not use the hight attribute then your layer will not be out of proportion, as it will take the height of the content only .And BGCOLOR of course will provide a background color to your layer.