function trhighlight() {
  if (document.getElementById && document.createTextNode) {
    var tables=document.getElementsByTagName('table');
    for (var i=0;i<tables.length;i++)
    {
      if(tables[i].className=='ruler') {
        var trs=tables[i].getElementsByTagName('tr');
        for(var j=0;j<trs.length;j++)
        {
            trs[j].onmouseover=function(){this.style.backgroundColor="#DFE5E8"}
            trs[j].onmouseout=function(){this.style.backgroundColor="#E9EFF1"}
        }
      }
    }
  }
}
if (window.addEventListener)
window.addEventListener("load", trhighlight, false)
else if (window.attachEvent)
window.attachEvent("onload", trhighlight)