function alternate(id)
	{
		if(document.getElementsByTagName)
		{  
			var table = document.getElementById(id);  
			var rows = table.getElementsByTagName("tr");  
			for(i = 0; i < rows.length; i++)
			{
				//manipulate rows
				if(i % 2 == 0)
				{
					if (rows[i].className != "header")
					{ rows[i].className = "even"; }
				} else {
					if (rows[i].className != "header")
					{ rows[i].className = "odd"; }
				}      
			}
		}
	}