stuHover = function() {
	var cssRule;
	var newSelector;
	for (var i = 0; i < document.styleSheets.length; i++)
		for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
			{
			cssRule = document.styleSheets[i].rules[x];
			if (cssRule.selectorText.indexOf("LI:hover") >= 0)
			{
				 newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
				document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
			}
		}
	var getElm = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<getElm.length; i++) {
		getElm[i].onmouseover=function() {
			this.className+=" iehover";
		}
		getElm[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" iehover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", stuHover);

function openFoto(img) {
	foto1= new Image();
	foto1.src=(img);
	Controlla(img);
}

function Controlla(img) {
	if ((foto1.width!=0)&&(foto1.height!=0)) {
		ViewFoto(img);
	} else {
		funzione="Controlla('"+img+"')";
		intervallo=setTimeout(funzione,20);
	}
}

function ViewFoto(img) {
	largh=foto1.width+20;
	altez=foto1.height+20;
	yPos = ((screen.height / 2) - (parseInt(altez) / 2));
	xPos = ((screen.width / 2) - (parseInt(largh) / 2));
	stringa="width="+largh+",height="+altez+",top="+yPos+",left="+ xPos;
	finestra=window.open(img,"",stringa);
}