function bgal(n,z){
  if( n == 0 ){
    document.getElementById('b'+'1').style.display = 'block';
  } else {
    for( var i=1; i<=z; i++ ){
      if( i != n ){
        document.getElementById('b'+i).style.display = 'none';
      }
    }
    document.getElementById('b'+n).style.display = 'block';
  }
}
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}