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The current ruler widget is based on code contributed from an external source, and was implemented at the beginning of the CWC project before we understood a lot about DHTML and javascript. There are a lot of very slick ruler implementations out there, and the Chameleon one is probably the worst. This widget needs a complete redesign from scratch to bring the source in line with our current javascript/DHTML standards, and to make it a lot more useful and informative.