function apri_absolute(_layer) {		
	$('#' + _layer).css('visibility', 'visible');
	$('#' + _layer).css('position', 'absolute');
}

function apri_relative(_layer) {		
	$('#' + _layer).css('visibility', 'visible');
	//$('#' + _layer).slideToggle("slow");
	$('#' + _layer).css('position', 'relative');
	$('#' + _layer).css('display', 'block');
}


function chiudi(_layer) {
	//$('#' + _layer).slideToggle("fast");
	$('#' + _layer).css('visibility', 'hidden');
	$('#' + _layer).css('position', 'absolute');
}