Pragmatic.js code style guidelines by Thomas Fuchs

    Writing less code is good; emphasized by the no 
    optional semicolons rule, by no curly braces where 
    not necessary and by using functional programming 
    constructs whereever possible.

Edit: just read the linked http://mislav.uniqpath.com/2010/05/semicolons/ very good explanation why semicolons are questionable at best.