rem: this.deltaY =  window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop 
add: this.deltaY =  window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop 
context:   prepare: function() {    this.deltaX =  window.pageXOffset                 || document.documentElement.scrollLeft                 || document.body.scrollLeft                 || 0;    this.deltaY =  window.pageYOffset                 || document.documentElement.scrollTop                 || document.body.scrollTop                 || 0;  },
meta: 1434	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1434/3f913f897829fb026ef98df2d57f8da94ee5339d/prototype.js/clean/public/javascripts/prototype.js