// JavaScript Document
function show(field)
	{
	document.getElementById('1').style.display = "none";
	document.getElementById('2').style.display = "none";
	document.getElementById('3').style.display = "none";
	document.getElementById('4').style.display = "none";
	document.getElementById('5').style.display = "none";
	document.getElementById('6').style.display = "none";
	document.getElementById('7').style.display = "none";
	document.getElementById('8').style.display = "none";
	document.getElementById('9').style.display = "none";
	document.getElementById('10').style.display = "none";
	document.getElementById('11').style.display = "none";
	document.getElementById('12').style.display = "none";
	document.getElementById('13').style.display = "none";
	document.getElementById('14').style.display = "none";
	document.getElementById('15').style.display = "none";
	document.getElementById('16').style.display = "none";
	document.getElementById('17').style.display = "none";
	document.getElementById('18').style.display = "none";
	document.getElementById('19').style.display = "none";
	document.getElementById('20').style.display = "none";
	document.getElementById('21').style.display = "none";
	document.getElementById(field).style.display = "block";
	}

function hide(field)
	{
	document.getElementById('1').style.display = "block";
	document.getElementById('2').style.display = "none";
	document.getElementById('3').style.display = "none";
	document.getElementById('4').style.display = "none";
	document.getElementById('5').style.display = "none";
	document.getElementById('6').style.display = "none";
	document.getElementById('7').style.display = "none";
	document.getElementById('8').style.display = "none";
	document.getElementById('9').style.display = "none";
	document.getElementById('10').style.display = "none";
	document.getElementById('11').style.display = "none";
	document.getElementById('12').style.display = "none";
	document.getElementById('13').style.display = "none";
	document.getElementById('14').style.display = "none";
	document.getElementById('15').style.display = "none";
	document.getElementById('16').style.display = "none";
	document.getElementById('17').style.display = "none";
	document.getElementById('18').style.display = "none";
	document.getElementById('19').style.display = "none";
	document.getElementById('20').style.display = "none";
	document.getElementById('21').style.display = "none";
	}