add: if(this.options.offset) offsets[1] += this.options.offset; 
context:   setup: function() {    Position.prepare();    var offsets = Position.cumulativeOffset(this.element);    var max = window.innerHeight ?       window.height - window.innerHeight :      document.body.scrollHeight -         (document.documentElement.clientHeight ?           document.documentElement.clientHeight : document.body.clientHeight);    this.scrollStart = Position.deltaY;    this.delta = (offsets[1] > max ? max : offsets[1]) - this.scrollStart;  },
meta: 5663	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5663/d29159eae8749c508d01bb447868321a3ba6bbfa/effects.js/buggy/manager/media/script/scriptaculous/effects.js