function closeBox(toClose) {
	document.getElementById(toClose).style.display = "none";
	// il terzo valore indica, in giorni, la durata del cookie
	setCookie(toClose, "closed", 1);
}
function setCookie(cName, value, expiredays) {
	var expDate = new Date();
	expDate.setDate(expDate.getDate()+expiredays);
	document.cookie=cName + "=" + escape(value) +
	";expires=" + expDate.toGMTString();
}
//function loadMsg(splash_div) {
function loadMsg(which_class) {
	msg = document.getElementsByTagName("div");
	for (i=0; i<msg.length; i++) {
		if(msg[i].className == which_class) {
			if(document.cookie.indexOf(msg[i].id) == -1) {
				msg[i].style.display = "block";
			}
		}
	}
}

// launch ------------------------------------

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            if (oldonload) {
                oldonload();
            }
            func();
        }
    }
}

addLoadEvent(function() {
    loadMsg('splash_div');
})