if(document.images) 
{    
  mn_home_on = new Image;
  mn_home_on.src = 'img/mn_home_on.gif';
  mn_home_off = new Image;
  mn_home_off.src = 'img/mn_home_off.gif';     

  mn_portfolio_on = new Image;
  mn_portfolio_on.src = 'img/mn_portfolio_on.gif';
  mn_portfolio_off = new Image;
  mn_portfolio_off.src = 'img/mn_portfolio_off.gif';     

  mn_vita_on = new Image;
  mn_vita_on.src = 'img/mn_vita_on.gif';
  mn_vita_off = new Image;
  mn_vita_off.src = 'img/mn_vita_off.gif';     

  mn_kontakt_on = new Image;
  mn_kontakt_on.src = 'img/mn_kontakt_on.gif';
  mn_kontakt_off = new Image;
  mn_kontakt_off.src = 'img/mn_kontakt_off.gif';     

  p_jazz_farbe_on = new Image;
  p_jazz_farbe_on.src = 'img/p_jazz_farbe_on.gif';
  p_jazz_farbe_off = new Image;
  p_jazz_farbe_off.src = 'img/p_jazz_farbe_off.gif';     

  p_jazz_sw_on = new Image;
  p_jazz_sw_on.src = 'img/p_jazz_sw_on.gif';
  p_jazz_sw_off = new Image;
  p_jazz_sw_off.src = 'img/p_jazz_sw_off.gif';     

  p_people_on = new Image;
  p_people_on.src = 'img/p_people_on.gif';
  p_people_off = new Image;
  p_people_off.src = 'img/p_people_off.gif';     

  p_events_on = new Image;
  p_events_on.src = 'img/p_events_on.gif';
  p_events_off = new Image;
  p_events_off.src = 'img/p_events_off.gif';     

  p_theater_on = new Image;
  p_theater_on.src = 'img/p_theater_on.gif';
  p_theater_off = new Image;
  p_theater_off.src = 'img/p_theater_off.gif';     

  p_diverse_on = new Image;
  p_diverse_on.src = 'img/p_diverse_on.gif';
  p_diverse_off = new Image;
  p_diverse_off.src = 'img/p_diverse_off.gif';     

  p_features_1_on = new Image;
  p_features_1_on.src = 'img/p_features_1_on.gif';
  p_features_1_off = new Image;
  p_features_1_off.src = 'img/p_features_1_off.gif';     

  p_features_2_on = new Image;
  p_features_2_on.src = 'img/p_features_2_on.gif';
  p_features_2_off = new Image;
  p_features_2_off.src = 'img/p_features_2_off.gif';     

  p_features_3_on = new Image;
  p_features_3_on.src = 'img/p_features_3_on.gif';
  p_features_3_off = new Image;
  p_features_3_off.src = 'img/p_features_3_off.gif';     

  p_features_4_on = new Image;
  p_features_4_on.src = 'img/p_features_4_on.gif';
  p_features_4_off = new Image;
  p_features_4_off.src = 'img/p_features_4_off.gif';      
}

function imgAct(img_name)
{
  if(document.images) {
    img_on = eval(img_name + '_on.src');      
	  document.getElementById(img_name).src = img_on;
  }
}

function imgInact(img_name)
{
  if(document.images) {
    img_off = eval(img_name + '_off.src');          
    document.getElementById(img_name).src = img_off;
  }
}