Drupal 6 proper coding and improved implementation

Issue Summary

There were Drupal 6 compatibility problems with this release so I have done the edits and also solved the markup validation errors, implemented the coding standards and used page handlers. The code had failed the coding standards quite badly so I did minor changes.

Thanks for this module, I do hope a future release would implement the page handlers like I did to reduce the memory usage of this module. My implementation has reduced it from about 55,000 bytes to 31,000 bytes.

I do not have a patch program so I have included all the changed and additional files.