function setOpacity(obj,opacity){
//obj.style.filter = "alpha(opacity:"+opacity+")";  // IE/Win
//obj.style.KHTMLOpacity = opacity/100; // Safari<1.2, Konqueror
//obj.style.MozOpacity = opacity/100;   // Older Mozilla and Firefox
//obj.style.opacity = opacity/100;      // Safari 1.2, newer Firefox and Mozilla, CSS3
}

function getElement(id)
{
	if (document.getElementById)
	{
		return document.getElementById(id);
	}
	else if (document.all)
	{
		return document.all[id];
	}
	else if (document.layers)
	{
		return document.layers[id];
	}
}


function initOpacity(){
el = getElement('foto1');
setOpacity (el, 100);
el = getElement('foto2');
setOpacity (el, 100);
el = getElement('foto3');
setOpacity (el, 100);
el = getElement('foto4');
setOpacity (el, 100);
}

function cambiaImmagine(path, target){
	el = getElement(target);
	el.src = path;
}
function cambiaTesto(testo,target) {
	el = getElement(target);
	var span_textnode = el.firstChild;
	span_textnode.data=testo;
}