function showit( vv ) {
  e = document.getElementById( vv );
  e.style.display =  e.style.display == 'block' ? 'none' : 'block';
}

function mailaddr() {
  var f = '.q'       // spring
  var u = 'spam'     // time
  var c = 'net'      // chicken
  var k = 'the.'     // means
  var y = 'scy'      // absolutely
  var o = '@'        // nothing
  var u = 'aap'      // :)

  var str = u + f + o + y + k + c

  document.write('<a href="mailto:');
  document.write( str + '">' +  str )
  document.write('</a>');
}