/*
  navigation.js

  implements the dynamic behavior of the menus

*/

// for Topnav
function showDrop(id, menu)
{
  hideAll(menu);
  var dd = document.getElementById(id);
  if ( dd )
    dd.style.display='block';
}

function hideAll(menu)
{
  if (menu=='main') {
    var dd = document.getElementById('drop_wave')
    if ( dd )
      dd.style.display='none';
    dd = document.getElementById('drop_support');
    if ( dd )
      dd.style.display='none';
    dd = document.getElementById('drop_distributors');
    if ( dd )
      dd.style.display='none';
    dd = document.getElementById('drop_news');
    if ( dd )
      dd.style.display='none';
    dd = document.getElementById('drop_about');
    if ( dd )
      dd.style.display='none';
  }
}