function aprichiudi( targetId ){
    if( document.getElementById ){
	target = document.getElementById(targetId);
	if( target.style.display == "none" ){
	    target.style.display = "block";
	}
	else{
	    target.style.display = "none";
	}
    }
}


function aprichiudi2( targetId, target2Id ){
    if( document.getElementById ){
	target = document.getElementById(targetId);
	target2 = document.getElementById(target2Id);
	if( target.style.display == "none" ){
	    target.style.display = "block";
		target2.style.display = "none";
	}
	else{
	    target.style.display = "none";
		target2.style.display = "block";
	}
    }
}

function openWindow( url ){
    window.open(url, 'finestra', 'height=270, width=320, toolbar=0, statusbar=0, scrollbar=0, left=300, top=100');

}