//showing and hiding the layers/divs
function findObj(n, d) { 
	var p,i,x;
	if(!d) d=document;
	if((p=n.indexOf("?"))>0&&parent.frames.length) {
    		d=parent.frames[n.substring(p+1)].document;
		n=n.substring(0,p);
	}
	if(!(x=d[n])&&d.all) x=d.all[n];
	for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  	for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
	if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function showHideLayers() { 
  	var i,p,v,obj,args=showHideLayers.arguments;
	for (i=0; i<(args.length-2); i+=3) if ((obj=findObj(args[i]))!=null) { 
		v=args[i+2];
		if (obj.style) { 
			obj=obj.style; 
			v=(v=='show')?'visible':(v='hide')?'hidden':v; 
		}
    		obj.visibility=v; 
	}
}

hidecheck = null;
function nav_show(selection){
	var navName = selection;
	var navLength = navName.length;
	var imgName = navName.substring(4,navLength);
	imgOver(imgName);
        showHideLayers(selection,'','show')
	if (hidecheck) {
		hidecheck = null;
	}
}
function nav_hide(selection){
	var navName = selection;
	var navLength = navName.length;
	var imgName = navName.substring(4,navLength);
	imgOut(imgName);
	hidecheck = showHideLayers(selection,'','hide');
}
function debug(content){
	debugdoc.document.debugform.debug.value = content;
}
function bgover(obj){
	obj.style.background='#DEE1B6'; // colore della cella selezionata
	obj.style.cursor = 'hand';
}
function bgout(obj){
	obj.style.background='#FFFFF6'; // colore della cella
}
function cellclick(url){
	document.location.href = url;
}