rem: else this.index = this.entryCcount-1; 
add: else this.index = this.entryCount-1; 
context:   markPrevious: function() {    if(this.index > 0) this.index--      else this.index = this.entryCcount-1;  },
meta: 3991	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3991/d29159eae8749c508d01bb447868321a3ba6bbfa/controls.js/clean/manager/media/script/scriptaculous/controls.js