rem: return ((this.offset[0] + element.offsetWidth) - this.xcomp) / 
add: return ((this.offset[0] + element.offsetWidth) - this.xcomp) / 
context:   overlap: function(mode, element) {      if (!mode) return 0;      if (mode == 'vertical')       return ((this.offset[1] + element.offsetHeight) - this.ycomp) /         element.offsetHeight;    if (mode == 'horizontal')      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /         element.offsetWidth;  },
meta: 1331	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1331/9867ca01ad65827d23c0bf6cc14d8a64137e927d/prototype.js/clean/tracks/public/javascripts/prototype.js