function SwitchImg()
{
	var rem, keep=0, store, obj, switcher=new Array, history=document.Data;
	for (rem=0; rem < (SwitchImg.arguments.length-2); rem+=3) {
		store = SwitchImg.arguments[(navigator.appName == 'Netscape')?rem:rem+1];
		if ((store.indexOf('document.layers[')==0 && document.layers==null) || (store.indexOf('document.all[')==0 && document.all==null))
			store = 'document'+store.substring(store.lastIndexOf('.'),store.length);
		obj = eval(store);
		if (obj != null) {
			switcher[keep++] = obj;
			switcher[keep++] = (history==null || history[keep-1]!=obj)?obj.src:history[keep];
			obj.src = SwitchImg.arguments[rem+2];
		}
	}
	document.Data = switcher;
}

function RestoreImg() {
	if (document.Data != null)
	for (var rem=0; rem<(document.Data.length-1); rem+=2)
	document.Data[rem].src=document.Data[rem+1];
}

function precarica() {
	if (document.images) {
		var immagini = precarica.arguments;
		if (document.preloadArray==null) document.preloadArray = new Array();
		var i = document.preloadArray.length;
		with (document) for (var j=0; j<immagini.length; j++) if (immagini[j].charAt(0)!="#"){
			preloadArray[i] = new Image;
			preloadArray[i++].src = immagini[j];
		}
	}
}