In many real application, the charts created by ChartDirector are to be displayed inside HTML based web pages.
To include any image in a HTML web page, one needs to insert an <IMG> tag in the HTML web page. When the browser sees the <IMG> tag, it will load the image using the URL in the <IMG> tag with another HTTP connection.
The same method applies when including a ChartDirector chart in a HTML web page. An <IMG> tag should be inserted in the web page, with its URL pointing to a charting script (a script that uses ChartDirector to create and deliver chart images).
In the above code, the "http://aaa.bbb.ccc.ddd/aspdemo/simplebar.asp" is a charting script that uses ChartDirector to create and deliver chart images.
You can include multiple charts in the same web page by using multiple <IMG> tags pointing to multiple charting scripts.