function activateMenu(id) {

var td = document.getElementById(id + '_up');
if(id == "guida") {
	td.style.backgroundImage = "url('images/menuAlto.png')";
} else {
	td.style.backgroundImage = "url('images/sfondoMenuRosso.png')";
}

td.getElementsByTagName('a')[0].style.color = '#e4c3a8';

var td = document.getElementById(id + '_down');
td.getElementsByTagName('img')[0].src = "images/barrettinaMenuRossa.png";

}


function deactivateMenu(id) {

var td = document.getElementById(id + '_up');
td.style.backgroundImage = "";

td.getElementsByTagName('a')[0].style.color = '';

var td = document.getElementById(id + '_down');
td.getElementsByTagName('img')[0].src = "images/barrettinaMenuPanna.png";

}


function resizePage() {

try {
	var hBody = document.body.clientHeight;
	var hWin = document.documentElement.clientHeight;

	var hDiff = hWin - hBody;
	if(hDiff <= 0)
		return;

	var delta = hDiff / 2;

	var div = document.getElementById('resizeElement');
	var hOld = div.offsetHeight;
	var hNew = hOld + hDiff - delta;
	div.style.height = hNew + 'px';

} catch(error) {
	;
}

}