// 2008 11 17
// Toggles div class between class_on and class_off.
// When toggles a div on, other goes off.

function toggle( id )
{
    if( document.getElementById('faq_'+id).className == 'toggle-visible-on' )
    {
       document.getElementById('faq_'+id).className = 'toggle-visible-off';
    }
    else if( document.getElementById('faq_'+id).className == 'toggle-visible-off' )
    {
       document.getElementById('faq_'+id).className = 'toggle-visible-on';
       for( a=0; a<=28; a++ )
       {
         if( a != id )
         {
            document.getElementById( 'faq_' + a ).className = 'toggle-visible-off';
         }
       }
    }
}