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Dynamic HTML or '''DHTML''' is a method of creating interactive Web Site s by using a combination of static Markup Language HTML , a Client-side Scripting language (such as JavaScript ), the presentation definition language (e.g. Cascading Style Sheets ), and the Document Object Model . Some disadvantages of DHTML are that it is difficult to develop and Debug due to varying degrees of support among web browsers of the aforementioned technologies and that the variety of screen sizes means the end look can only be fine-tuned on a limited number of browser and screen-size combinations. Development for recent browsers, such as Internet Explorer 5.0+, Netscape 6.0+, and Opera 7.0+, is aided by a shared Document Object Model . STRUCTURE OF A WEB PAGE Typically a web page using DHTML is set up the following way
Often the JavaScript code is stored in an external file; this is done by Linking the file that contains the JavaScript. This is helpful when several pages use the same script: See also '' DOM Events '' EXAMPLE: DISPLAYING AN ADDITIONAL BLOCK OF TEXT The following code illustrates an often used function. An additional part of a web page will only be displayed if the user requests it. In E-learning , such a function could be used to display additional hints or an answer the student initially should not see.
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