function Amaga() {
	if (document.getElementById) {  // DOM3 = IE5, NS6
		document.getElementById('precarrega').style.visibility = 'hidden';}
	else {
		if (document.layers) {  // Netscape 4
			document.hidepage.visibility = 'hidden';}
		else {  // IE 4
			document.all.hidepage.style.visibility = 'hidden';
		}
	}
}

function MostrarPresentacioSencera() {
	var presentacio = document.getElementById("presentacio");
	if (!presentacio) return;
	var paragrafs = presentacio.getElementsByTagName("p");
	if (paragrafs.length == 0) return;
	var crida = document.getElementById("crida_mes");
	if (crida) crida.style.display = "none";
	for (var i = 0; i < paragrafs.length; i++) {paragrafs[i].style.display = "block";}
}