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: 3974	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3974/af9adbf17404d887f31369756326b0109da7ae2b/effects.js/clean/root/static/js/effects.js