If a user is burdened with a slow Internet connection, he will find that it takes time for a web page to be displayed (downloaded) to his client computer. Now there's a way to arrange it so that only the first page of his requested web site would take a long time to be downloaded; the rest of the pages would come very fast. This can be a real advantage. If you want to learn more about this approach, referred to as Active Client Pages, keep reading.
Active Client Pages: Chrys`s Approach - DOM Properties and Methods to Use (Page 4 of 4 )
We shall use the DOM Document object. Each page is a DOM document object.
Document Object Properties
cookie
Sets or returns all cookies associated with the current document
Document Object Methods
open()
Opens a stream to collect the output from any document.write() or document.writeln() methods.
close()
Closes an output stream opened with the document.open() method, and displays the collected data.
write()
Writes HTML expressions or JavaScript code to a document.
writeln()
Identical to the write() method, with the addition of writing a new line character after each expression.
We shall not use the writeln() method in this series. If you want more information on the write() and writeln() methods, then wait for an article that I will write on that. In that article I will say a lot about when, where and how to use these two methods. I will give you some explanation of the write method as we go along.
The Document Open Method
The document open method is a very important method in this series. Do not confuse this with the window open method. I will talk about the window open method when we deal with the next (window) phase of my approach. Let us now look at the document open method in more detail. We look at its syntax and parameters.
Syntax
The syntax is:
document.open(mimetype,replace)
The "document" here refers to the current document. It returns a reference to the document (page) opened. If a document already exists in the target, it will be cleared. If this method has no arguments, a new window with about:blank is displayed.
Parameter
Description
mimetype
Optional. Specifies the type of document you are writing to. Default value is "text/html"
replace
Optional. When set, it causes the history entry for the new document to inherit the history entry from the parent document
We have done a lot for this part. In the next part of the series, we shall look at the roots that give rise to my approach. I'll see you in the next part.
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JavaScript 
Active Client Pages: Summary of the Document Phase of Chrys`s Approach
