function toggle(fn,fc,an)
{
  if (fn=='frm_post_env'){
  	document.getElementById('frm_post').style.display = 'none';
  } else if (fn=='frm_post'){
    document.getElementById('frm_post_env').style.display = 'none';
  }
  vs = (document.getElementById(fn).style.display == 'none')? 'block': 'none';
  document.getElementById(fn).style.display = vs;
  if (vs != 'none')
  {
    window.open(an,'_self');
    document.getElementById(fc).focus();
  }
}