function table_rollover()
{
	if (document.getElementById && document.createTextNode)
	{
		var tables=document.getElementsByTagName('table');
		for (var i=0;i<tables.length;i++)
		{
			if(tables[i].className=='rollover')
			{
				var tds=tables[i].getElementsByTagName('td');
				for(var j=0;j<tds.length;j++)
				{
					if (tds[j].className!="rolloff" && tds[j].className!="current")
					{
						tds[j].onmouseover=function() {
							this.className='rolled_on'; return false
						}
						tds[j].onmouseout=function() {
							this.className=''; return false
						}
					}
				}
			}
		}
	}
}