function preview(url) {
	var e=document.getElementById("previewimg");
	if (e) e.src=url;
}

var introskipped = false;

function hideIntro() {
	var e=document.getElementById('intro');
	if (e) e.style.display = 'none';
	else return;
	introskipped = true;
	var e=document.getElementById('skipintro');
	var i=e.getElementsByTagName("IMG");
	i[0].src="img/px.gif";
	e.insertBefore(i[0], e.firstChild);
	while(e.childNodes.length>1)e.removeChild(e.childNodes[1]);
}