function alternateRows() {
el = document.getElementsByTagName("table");
  for (i=0; i<el.length; i++)
    if (el[i].className == "VEPositionLocationTable" || el[i].className == "SearchResultsTable") {
      rows = el[i].getElementsByTagName("tr");
    for (j=0; j<rows.length; j++)
      rows[j].className = "row" + (j % 2);
  }
}