rem: return event.pageY || (event.clientY + 
add: return event.pageY || (event.clientY + 
context:   pointerY: function(event) {    return event.pageY || (event.clientY +       (document.documentElement.scrollTop || document.body.scrollTop));  },
meta: 856	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/856/3f913f897829fb026ef98df2d57f8da94ee5339d/prototype.js/clean/public/javascripts/prototype.js