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';
		}
	}
}