function jscoverage_findPos(obj) {
  var result = 0;
  do {
    result += obj.offsetTop;
    obj = obj.offsetParent;
  }
  while (obj);
  return result;
}
function jscoverage_findPos(obj) {
  var result = 0;
  do {
    result += obj.offsetTop;
    obj = obj.offsetParent;
  }
  while (obj);
  return result;
}
function jscoverage_findPos ( obj ) { var result = 0 ; do { result += obj . offsetTop ; obj = obj . offsetParent ; } while ( obj ) ; return result ; }
http://www.quirksmode.org/js/findpos.html
http : // www . quirksmode . org / js / findpos . html