function stripeTables() {
  if (!document.getElementsByTagName) return false;
  var tables = document.getElementsByTagName("tbody");
  for (var i=0; i<tables.length; i++) {
    var odd = false;
    var rows = tables[i].getElementsByTagName("tr");
    for (var j=0; j<rows.length; j++) {
      if (odd == true) {
        addClass(rows[j],"alt");
        odd = false;
      } else {
        odd = true;
      }
    }
  }
}

function highlightRows() {
	if(!document.getElementsByTagName) return false;
	var tables = document.getElementsByTagName("tbody");
	for (var i=0; i<tables.length; i++) {
		var rows = tables[i].getElementsByTagName("tr");
		for (var i=0; i<rows.length; i++) {
			rows[i].oldClassName = rows[i].className
			rows[i].onmouseover = function() {
				addClass(this,"highlight");
			}
			rows[i].onmouseout = function() {
				this.className = this.oldClassName
			}
		}
	}
}

addLoadEvent(stripeTables);
addLoadEvent(highlightRows);