function apri_chiudi( id_div ) {
       if (document.getElementById){
		if(document.getElementById(id_div).style.display == 'none'){
			document.getElementById(id_div).style.display = 'block';
		}
		else{
			document.getElementById(id_div).style.display = 'none';
		}
	}
}
function intercetta() { 
	for (var i=0; i<document.links.length; i++)
		if (document.links[i].className=="blank") {
			document.links[i].target="_blank";
		} 
}
window.onload = intercetta;