old = null;
function showDiv(obj,img,back1,back2){
	if(old==null){
		old = obj;
		chiudiTutto()
		document.getElementById(obj).style.visibility='visible';
		document.getElementById(obj).style.position='relative';
		document.getElementById(back1).style.backgroundColor='#F7F7F7';
		document.getElementById(back2).style.backgroundColor='#F7F7F7';
		document.getElementById(img).src='/img/elementigrafici/icoMeno.gif';
	}else if(old == obj){
		document.getElementById(old).style.visibility='hidden';
		document.getElementById(old).style.position='absolute';
		document.getElementById(back1).style.backgroundColor='#FFFFFF';
		document.getElementById(back2).style.backgroundColor='#FFFFFF';
		document.getElementById(img).src='/img/elementigrafici/icoPiu.gif';
		old=null;
	}else{
		old = obj;
		chiudiTutto()
		document.getElementById(obj).style.visibility='visible';
		document.getElementById(obj).style.position='relative';
		document.getElementById(back1).style.backgroundColor='#F7F7F7';
		document.getElementById(back2).style.backgroundColor='#F7F7F7';
		document.getElementById(img).src='/img/elementigrafici/icoMeno.gif';
	}
	
}

function chiudiTutto(){
		for(i = 1; i<elementi; i++){
			document.getElementById("list"+ i).style.visibility='hidden';
			document.getElementById("list"+ i).style.position='absolute';
			document.getElementById("img"+ i).src='/img/elementigrafici/icoPiu.gif';
			document.getElementById("back1"+i).style.backgroundColor='#FFFFFF';
			document.getElementById("back2"+i).style.backgroundColor='#FFFFFF';
		}

}