//here you place the ids of every element you want.
var ids_news=new Array('blocco_news01','blocco_news02','blocco_news03');

function switchid_news(id_news){	
	hideallids_news();
	showdiv_news(id_news);
}

function hideallids_news(){
	//loop through the array and hide each element by id
	for (var i=0;i<ids_news.length;i++){
		hidediv_news(ids_news[i]);
	}		  
}

function hidediv_news(id_news) {
	//safe function to hide an element with a specified id
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id_news).style.display = 'none';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id_news.display = 'none';
		}
		else { // IE 4
			document.all.id_news.style.display = 'none';
		}
	}
}

function showdiv_news(id_news) {
	//safe function to show an element with a specified id
		  
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById(id_news).style.display = 'block';
	}
	else {
		if (document.layers) { // Netscape 4
			document.id_news.display = 'block';
		}
		else { // IE 4
			document.all.id_news.style.display = 'block';
		}
	}
}
function switchclass_news(id_news,id_news2,id_news3){
	if (document.getElementById(id_news).className == 'menu') { // DOM3 = IE5, NS6
		document.getElementById(id_news).className= 'click';
		document.getElementById(id_news2).className= 'menu';
		document.getElementById(id_news3).className= 'menu';
	}
	else {
	}
}