// open a custom windows (full parameters)
function isNull(v) 		{ return (typeof(v)=="undefined"||v==null); }
function openPopUp(url,x,y)		{
var name="Gufram";
var focusOnPopUp=1;
var param="toolbar=no, status=1, scrollbars=0,resizable=no'";
	// dimensioni
	var winSize="";
	winSize+="width="+x+",";
	winSize+="height="+y+",";

	// new windows
	if(isNull(siteWindowVar)) {
	
	//siteWindowVar.close()
	}
	var siteWindowVar=open("pop.html?image="+url,"Gufram",winSize+param);
	siteWindowVar.resizeTo(x,y);
	siteWindowVar.focus()
	
	// il return serve per controllare eventuali popup bloccati o javascript non abilitato
	//return (isNull(siteWindowVar));
}

function credits() 
{ 

finestra = window.open("credits.html","credits"," width=500,height=300,left=500,top=500,toolbar=no, location=no,status=no,menubar=no,scrollbars=no,resizable=no"); 
 
}