Building efficient websites with AJAX
This does not exhaust the capabilities of dynamic HTML, including graphics that legacy HTML could only implement by embedding bitmaps.
User input can be visualized without server interaction, thus reducing the load on the server. Normally, much of a web server's bandwidth is consumed by serving up graphics.
Unfortunately, multi-browser support is not guaranteed: None of the popular browsers support all three formats referred to here.
Firefox can handle SVG and Canvas, Safari just Canvas, and Internet Explorer just VML.
Tried and Trusted Tools
The boxes are made up of freely positioned CSS div elements. If em is used as a unit instead of px (pixel) for placing and sizing, the box height, width, and position are based on the size of the letter "m."
The whole graph will then scale to reflect the text size without any effort on the developer's part.
Users can also easily scale the graphic up and down in most browsers with the mouse wheel.
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