// cambia la visibilità dei divs nel divIDs
function cambiaBox(wID) {
	var tabs = document.getElementsByClassName('tb');
	for (i=0;i<tabs.length;i++) {
		var iState = (tabs[i]==tabs[wID]);
		tabs[i].style.display = iState ?  "block" : "none";
	}
}
//
function init() {
	cambiaBox(0);
	aFie(r_cont);
	$('dv0').style.backgroundColor="transparent";
	$('dv0').style.filter="alpha(opacity=100)";
}
function cambia (wID) {
 	cambiaBox(wID);
 	aFie(r_cont.replace(".php","_"+wID+".php"));
}
function initThis() {
// controlla se esistono tabs
	if (document.getElementsByClassName('tb').length>1) {
		cambiaBox(0);
		$('rt').style.backgroundImage= "url(images/art_splash.gif)";
	}	
	//changefs();
}
function aFie(what) {
	var xmlHttp;
	try {
// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	} catch (e) {
	// Internet Explorer
    	try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
        		alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	xmlHttp.onreadystatechange=function() {
		if (xmlHttp.readyState==4) {
			//new Effect.Opacity('dv0', {to:0});
			$('dv0').replace(xmlHttp.responseText);
			//new Effect.Opacity('dv0', {duration:1, from:0, to:0.5});
		}
	}
	$('dv0').replace("<div id='dv0' class='dv load'></div>");
	xmlHttp.open("GET",what,true);
	xmlHttp.send(null);
}
function toggleMail(checkB) {
	$('snailmail').style.display = checkB.checked ?  "block" : "none";
}
function cambiaMail(how) {
	$('snailmail').style.display = how ?  "block" : "none";
}
function changefs() {
	var fs = $('base').getWidth()/1100;
	if (fs > 0.9) $('base').style.fontSize=fs+"em";
}