function doPBMouseOut(){
    el = getRealName(window.event.srcElement)
    if(el && (el.tagName == "TR") && (el.id == "listTR")){
      el.className = "listTR";
    }  
  }
  
  function doPBMouseOver(){
    el = getRealName(window.event.srcElement)
    if(el && (el.tagName == "TR") && (el.id == "listTR")){
      el.className = "listMouseover";
    }
  }
  
  function getRealName(pEl){
  var tempEl;
  while(pEl.tagName != "BODY"){
    if (pEl.tagName == "TR"){
      return pEl;
    }else{
      pEl = pEl.parentElement;
    }
  }
  }
  
  document.onmouseout = doPBMouseOut;
  document.onmouseover = doPBMouseOver;