/*
   tableruler()
   written by Chris Heilmann for alistapart.
   enables a rollover of rows for each table with the classname ...
*/

function tableruler()
{
  if (document.getElementById && document.createTextNode)
  {
    var tables=document.getElementsByTagName('table');
    for (var i=0;i<tables.length;i++)
    {
      if ((tables[i].className=='ruler') || (tables[i].className=='tech'))
      {
        var trs=tables[i].getElementsByTagName('tr');
        for(var j=0;j<trs.length;j++)
        {
          if(trs[j].parentNode.nodeName=='TBODY' && trs[j].className=="")
          {
            trs[j].onmouseover=function(){this.className='ruled';return false}
            trs[j].onmouseout=function(){this.className='';return false}
          }
        }
      }
    }
  }
}

addEvent(window, 'load', tableruler);