az.background = lab.background = ser.background = true;
az.backgroundColor = lab.backgroundColor = ser.backgroundColor = 0xf0f0f0;
voci = ['az','lab','ser','info', 'app']

for(a=0;a<voci.length;a++){
_root[voci[a]]._visible = true
}
for(a=0;a<voci.length;a++){
_root[voci[a]]._visible = true
}