Ignore-this: 4c7b7b3ebc83ce596e8a7e41d6a88f09

Another round of cleaning up the JavaScript code. A new bind() utility
function [1] was introduced and all eval() calls where removed from the
toolbar code.

[1] See http://www.cosmocode.de/en/blog/gohr/2009-10/15-javascript-fixing-the-closure-scope-in-loops

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