function over (id, parent)
	{
	document.getElementById(id).style.display='block';
	document.getElementById(parent).style.backgroundPosition='0px -30px'
	}
function out (id, parent)
	{
	document.getElementById(id).style.display='none';
	document.getElementById(parent).style.backgroundPosition='0px 0px'
	}
function launchTour(page) {
	howTall = (screen.availHeight - 450)/2;
	howWide = (screen.availWidth - 600)/2;
	tourWindow = window.open(page+'.htm','new','width=700,height=500,screenX=100,screenY=100,top='+howTall+',left='+howWide+'menubar=yes,resizable=no,titlebar=no,status=no,toolbar=no,scrollbars=no');
	if (window.focus) {tourWindow.focus()}
	}
function launchBigImg(page) {
	howTall = (screen.availHeight - 650)/2;
	howWide = (screen.availWidth - 1000)/2;
	tourWindow = window.open(page+'.htm','new','width=836,height=615,screenX=100,screenY=100,top='+howTall+',left='+howWide+'menubar=yes,resizable=no,titlebar=no,status=no,toolbar=no,scrollbars=no');
	if (window.focus) {tourWindow.focus()}
	}