function popupcontact() 
{
	page = "pontisola.html";
	
	var v = Math.floor((screen.width-800)/2);
	var h = Math.floor((screen.height-600)/2);

	slidewin = window.open(page,"pop2","top=" + h + ",left=" + v + ",width=800,height=600,status=no,toolbar=no,menubar=no,scrollbars=no,resizable=no");
	slidewin.focus();
}

function off_offerte(){
document.getElementById('liv8').style.visibility = "hidden"
}

function on_offerte(){
document.getElementById('liv8').style.visibility = "visible"
}