function tab (mod,cursor,n){
	for(i=1;i<=n;i++){
		var nav=document.getElementById(mod+i);
		var cont=document.getElementById(mod+"_"+"cont"+i);
		nav.className=(i==cursor)?"current":"";
		cont.style.display=(i==cursor)?"block":"none";
	}
}

function nn(mm,xx,yy){
		var cont=document.getElementById(mm+"_"+xx);
		if(yy==1){
		cont.style.display="block";
		}
		else if(yy==2){
		cont.style.display="none";
		}
}