rem: return event.pageX || (event.clientX + 
add: return event.pageX || (event.clientX + 
context:   pointerX: function(event) {    return event.pageX || (event.clientX +       (document.documentElement.scrollLeft || document.body.scrollLeft));  },
meta: 1434	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1434/3f913f897829fb026ef98df2d57f8da94ee5339d/prototype.js/clean/public/javascripts/prototype.js