function hideSelects()
	{
		s = document.getElementsByTagName("select");
		for (x=0; x < s.length; ++x)
		{
			s[x].style.visibility="hidden";
		}
	}
	
	function showSelects()
	{
		s = document.getElementsByTagName("select");
		for (x=0; x < s.length; ++x)
		{
			s[x].style.visibility="visible";
		}
	}