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')
			{
				var trs = tables[i].getElementsByTagName('tr');
				
				for (var j=0;j<trs.length;j++)
				{
					if (trs[j].parentNode.nodeName=='TBODY' &&
						trs[j].parentNode.nodeName!='TFOOT')
					{
						trs[j].onmouseover = function() { this.className='ruled';  return false }
						trs[j].onmouseout = function() { this.className=''; return false }
					}
				}
			}
		}
	}
}