function alternate()
{
	if(document.getElementsByTagName)
	{  
		tables = document.getElementsByTagName("table");
		for(d=0;d<tables.length;d++)
		{
			rows = tables[d].getElementsByTagName("tr");  
			for(i = 0; i < rows.length; i++)
			{    
				if(i % 2 == 0)
				{
					rows[i].className = "even";
				}
				else
				{
					rows[i].className = "odd";
				}      
			}
		}
	}
}