function showFeatureDetail(feature, intro)
{
	document.getElementById('title' + feature).className = 'shrink';
	if (intro) { document.getElementById('intro' + feature).className = 'hidden'; }
	document.getElementById('content' + feature).className = 'visible';
}

function hideFeatureDetail(feature, intro)
{
	document.getElementById('title' + feature).className = 'expand';
	if (intro) { document.getElementById('intro' + feature).className = 'visible'; }
	document.getElementById('content' + feature).className = 'hidden';
}