// SCRIPT BY ANDRIS ZAČS (R) 2006 andris.z@metaleks.lv
function swap_display_by_id( id ){  
  var a = document.getElementById( id );  
  if( a.style.display == 'none' ){
    a.style.display = '';
  } else {
    a.style.display = 'none';
  }
}
function display_by_id( id, type ){
  if( ! document.getElementById( id ) ){
    //alert( 'No object "' + id + '"!' ); 
    return;  
  }
  if( type ) {
    document.getElementById( id ).style.display=type;
    if( ( document.getElementById( id ).onHide ) && ( type == 'none' ) ) document.getElementById( id ).onHide();
    if( ( document.getElementById( id ).onDisplay ) && ( type = '' ) ) document.getElementById( id ).onDisplay(); 
  } else {
    document.getElementById( id ).style.display='';
    if( document.getElementById( id ).onDisplay ) document.getElementById( id ).onDisplay();    
  }  
}