if(document.images) 
{ 
  de_piano1_on = new Image;
  de_piano1_on.src = 'img/menue_de_piano/de_piano_on_1.gif';
  de_piano1_off = new Image;
  de_piano1_off.src = 'img/menue_de_piano/de_piano_off_1.gif';
  
  de_piano2_on = new Image;
  de_piano2_on.src = 'img/menue_de_piano/de_piano_on_2.gif';
  de_piano2_off = new Image;
  de_piano2_off.src = 'img/menue_de_piano/de_piano_off_2.gif';
  
  de_piano3_on = new Image;
  de_piano3_on.src = 'img/menue_de_piano/de_piano_on_3.gif';
  de_piano3_off = new Image;
  de_piano3_off.src = 'img/menue_de_piano/de_piano_off_3.gif';
  
  de_piano4_on = new Image;
  de_piano4_on.src = 'img/menue_de_piano/de_piano_on_4.gif';
  de_piano4_off = new Image;
  de_piano4_off.src = 'img/menue_de_piano/de_piano_off_4.gif';
  
  de_piano5_on = new Image;
  de_piano5_on.src = 'img/menue_de_piano/de_piano_on_5.gif';
  de_piano5_off = new Image;
  de_piano5_off.src = 'img/menue_de_piano/de_piano_off_5.gif';
  
  de_piano6_on = new Image;
  de_piano6_on.src = 'img/menue_de_piano/de_piano_on_6.gif';
  de_piano6_off = new Image;
  de_piano6_off.src = 'img/menue_de_piano/de_piano_off_6.gif';
  
  de_piano7_on = new Image;
  de_piano7_on.src = 'img/menue_de_piano/de_piano_on_7.gif';
  de_piano7_off = new Image;
  de_piano7_off.src = 'img/menue_de_piano/de_piano_off_7.gif';
  
  de_piano8_on = new Image;
  de_piano8_on.src = 'img/menue_de_piano/de_piano_on_8.gif';
  de_piano8_off = new Image;
  de_piano8_off.src = 'img/menue_de_piano/de_piano_off_8.gif';
  
  de_piano9_on = new Image;
  de_piano9_on.src = 'img/menue_de_piano/de_piano_on_9.gif';
  de_piano9_off = new Image;
  de_piano9_off.src = 'img/menue_de_piano/de_piano_off_9.gif';
  
  de_piano10_on = new Image;
  de_piano10_on.src = 'img/menue_de_piano/de_piano_on_10.gif';
  de_piano10_off = new Image;
  de_piano10_off.src = 'img/menue_de_piano/de_piano_off_10.gif';
  
  de_piano11_on = new Image;
  de_piano11_on.src = 'img/menue_de_piano/de_piano_on_11.gif';
  de_piano11_off = new Image;
  de_piano11_off.src = 'img/menue_de_piano/de_piano_off_11.gif';
    
  de_piano_tab1_on = new Image;
  de_piano_tab1_on.src = 'img/tabs_de_piano/de_piano_tab1_on.gif';
  de_piano_tab1_off = new Image;
  de_piano_tab1_off.src = 'img/tabs_de_piano/de_piano_tab1_off.gif';
  
  de_piano_tab2_on = new Image;
  de_piano_tab2_on.src = 'img/tabs_de_piano/de_piano_tab2_on.gif';
  de_piano_tab2_off = new Image;
  de_piano_tab2_off.src = 'img/tabs_de_piano/de_piano_tab2_on.gif';
  
  de_piano_tab3_on = new Image;
  de_piano_tab3_on.src = 'img/tabs_de_piano/de_piano_tab3_on.gif';
  de_piano_tab3_off = new Image;
  de_piano_tab3_off.src = 'img/tabs_de_piano/de_piano_tab3_off.gif';
  
  
  
  
  onetwo_dance1_on = new Image;
  onetwo_dance1_on.src = 'img/video_thumbs/01_videothumbs_on.jpg';
  onetwo_dance1_off = new Image;
  onetwo_dance1_off.src = 'img/video_thumbs/01_videothumbs_off.jpg';
  
  onetwo_dance2_on = new Image;
  onetwo_dance2_on.src = 'img/video_thumbs/02_videothumbs_on.jpg';
  onetwo_dance2_off = new Image;
  onetwo_dance2_off.src = 'img/video_thumbs/02_videothumbs_off.jpg';
  
  onetwo_dance3_on = new Image;
  onetwo_dance3_on.src = 'img/video_thumbs/03_videothumbs_on.jpg';
  onetwo_dance3_off = new Image;
  onetwo_dance3_off.src = 'img/video_thumbs/03_videothumbs_off.jpg';
  
  onetwo_dance4_on = new Image;
  onetwo_dance4_on.src = 'img/video_thumbs/04_videothumbs_on.jpg';
  onetwo_dance4_off = new Image;
  onetwo_dance4_off.src = 'img/video_thumbs/04_videothumbs_off.jpg';
  
  onetwo_dance5_on = new Image;
  onetwo_dance5_on.src = 'img/video_thumbs/05_videothumbs_on.jpg';
  onetwo_dance5_off = new Image;
  onetwo_dance5_off.src = 'img/video_thumbs/05_videothumbs_off.jpg';
  
  onetwo_dance_tab1_on = new Image;
  onetwo_dance_tab1_on.src = 'img/tabs_12dance/12dance_tab1_on.gif';
  onetwo_dance_tab1_off = new Image;
  onetwo_dance_tab1_off.src = 'img/tabs_12dance/12dance_tab1_on.gif';
  
  onetwo_dance_tab2_on = new Image;
  onetwo_dance_tab2_on.src = 'img/tabs_12dance/12dance_tab2_on.gif';
  onetwo_dance_tab2_off = new Image;
  onetwo_dance_tab2_off.src = 'img/tabs_12dance/12dance_tab2_off.gif';
  
  onetwo_dance_tab3_on = new Image;
  onetwo_dance_tab3_on.src = 'img/tabs_12dance/12dance_tab3_on.gif';
  onetwo_dance_tab3_off = new Image;
  onetwo_dance_tab3_off.src = 'img/tabs_12dance/12dance_tab3_off.gif';
  
  onetwo_dance_bigbutton_on = new Image;
  onetwo_dance_bigbutton_on.src = 'img/menue_12dance/bigbutton_on.gif';
  onetwo_dance_bigbutton_off = new Image;
  onetwo_dance_bigbutton_off.src = 'img/menue_12dance/bigbutton_off.gif';
  
  
  
  
  lounge_project1_on = new Image;
  lounge_project1_on.src = 'img/menue_lounge_project/lounge_project_on_1.gif';
  lounge_project1_off = new Image;
  lounge_project1_off.src = 'img/menue_lounge_project/lounge_project_off_1.gif';
  
  lounge_project2_on = new Image;
  lounge_project2_on.src = 'img/menue_lounge_project/lounge_project_on_2.gif';
  lounge_project2_off = new Image;
  lounge_project2_off.src = 'img/menue_lounge_project/lounge_project_off_2.gif';
  
  lounge_project3_on = new Image;
  lounge_project3_on.src = 'img/menue_lounge_project/lounge_project_on_3.gif';
  lounge_project3_off = new Image;
  lounge_project3_off.src = 'img/menue_lounge_project/lounge_project_off_3.gif';
  
  lounge_project4_on = new Image;
  lounge_project4_on.src = 'img/menue_lounge_project/lounge_project_on_4.gif';
  lounge_project4_off = new Image;
  lounge_project4_off.src = 'img/menue_lounge_project/lounge_project_off_4.gif';
  
  lounge_project5_on = new Image;
  lounge_project5_on.src = 'img/menue_lounge_project/lounge_project_on_5.gif';
  lounge_project5_off = new Image;
  lounge_project5_off.src = 'img/menue_lounge_project/lounge_project_off_5.gif';
  
  lounge_project6_on = new Image;
  lounge_project6_on.src = 'img/menue_lounge_project/lounge_project_on_6.gif';
  lounge_project6_off = new Image;
  lounge_project6_off.src = 'img/menue_lounge_project/lounge_project_off_6.gif';
  
  lounge_project7_on = new Image;
  lounge_project7_on.src = 'img/menue_lounge_project/lounge_project_on_7.gif';
  lounge_project7_off = new Image;
  lounge_project7_off.src = 'img/menue_lounge_project/lounge_project_off_7.gif';
  
  lounge_project8_on = new Image;
  lounge_project8_on.src = 'img/menue_lounge_project/lounge_project_on_8.gif';
  lounge_project8_off = new Image;
  lounge_project8_off.src = 'img/menue_lounge_project/lounge_project_off_8.gif';
  
  lounge_project9_on = new Image;
  lounge_project9_on.src = 'img/menue_lounge_project/lounge_project_on_9.gif';
  lounge_project9_off = new Image;
  lounge_project9_off.src = 'img/menue_lounge_project/lounge_project_off_9.gif';
  
  lounge_project10_on = new Image;
  lounge_project10_on.src = 'img/menue_lounge_project/lounge_project_on_10.gif';
  lounge_project10_off = new Image;
  lounge_project10_off.src = 'img/menue_lounge_project/lounge_project_off_10.gif';
  
  lounge_project_tab1_on = new Image;
  lounge_project_tab1_on.src = 'img/tabs_lounge_project/lounge_project_tab1_on.gif';
  lounge_project_tab1_off = new Image;
  lounge_project_tab1_off.src = 'img/tabs_lounge_project/lounge_project_tab1_off.gif';
  
  lounge_project_tab2_on = new Image;
  lounge_project_tab2_on.src = 'img/tabs_lounge_project/lounge_project_tab2_on.gif';
  lounge_project_tab2_off = new Image;
  lounge_project_tab2_off.src = 'img/tabs_lounge_project/lounge_project_tab2_off.gif';
  
  lounge_project_tab3_on = new Image;
  lounge_project_tab3_on.src = 'img/tabs_lounge_project/lounge_project_tab3_on.gif';
  lounge_project_tab3_off = new Image;
  lounge_project_tab3_off.src = 'img/tabs_lounge_project/lounge_project_tab3_on.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;
  }
}