if (navigator.userAgent.indexOf('AppleWebKit/') > -1)
	document.write("<link href='css/styles_safari.css' rel='stylesheet' type='text/css' />");

// if id is hidden, show it; else hide it.
function showHide(id) {
	var el = document.getElementById(id);
	if (el)
		el.style.display = el.style.display == 'none' ? '' : 'none';
}