rem: Event.observe(this.prev_month_button, 'click', (function () { this.nav_month(-1) }).bindAsEventListener(this)); 
add: Event.observe(this.prev_month_button, 'click', function () { this.nav_month(-1) }.bindAsEventListener(this)); 
context:     Event.observe(this.prev_month_button, 'click', (function () { this.nav_month(-1) }).bindAsEventListener(this));
meta: 10582	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10582/55db3fb5583efe6bcd8f107506f5250874c9c394/calendar_date_select.js/buggy/public/javascripts/calendar_date_select.js