 <!--Ein- und Ausblenden von der Content-DIVs-->
function show_emcotec_content_product_description()
 {
  document.getElementById('emcotec_content_product_description').style.display = 'block';
  document.getElementById('emcotec_content_specifications').style.display = 'none';
  document.getElementById('emcotec_content_downloads').style.display = 'none';
  document.getElementById('emcotec_content_resources').style.display = 'none';
  document.getElementById('emcotec_content_link_product_description').style.fontWeight = 'bold';
  document.getElementById('emcotec_content_link_specifications').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_downloads').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_resources').style.fontWeight = 'normal';
 }
 
 function show_emcotec_content_specifications()
 {
  document.getElementById('emcotec_content_product_description').style.display = 'none';
  document.getElementById('emcotec_content_specifications').style.display = 'block';
  document.getElementById('emcotec_content_downloads').style.display = 'none';
  document.getElementById('emcotec_content_resources').style.display = 'none';
  document.getElementById('emcotec_content_link_product_description').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_specifications').style.fontWeight = 'bold';
  document.getElementById('emcotec_content_link_downloads').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_resources').style.fontWeight = 'normal';
 }
 
 function show_emcotec_content_downloads()
 {
  document.getElementById('emcotec_content_product_description').style.display = 'none';
  document.getElementById('emcotec_content_specifications').style.display = 'none';
  document.getElementById('emcotec_content_downloads').style.display = 'block';
  document.getElementById('emcotec_content_resources').style.display = 'none';
  document.getElementById('emcotec_content_link_product_description').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_specifications').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_downloads').style.fontWeight = 'bold';
  document.getElementById('emcotec_content_link_resources').style.fontWeight = 'normal';
 }
 
 function show_emcotec_content_resources()
 {
  document.getElementById('emcotec_content_product_description').style.display = 'none';
  document.getElementById('emcotec_content_specifications').style.display = 'none';
  document.getElementById('emcotec_content_downloads').style.display = 'none';
  document.getElementById('emcotec_content_resources').style.display = 'block';
  document.getElementById('emcotec_content_link_product_description').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_specifications').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_downloads').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_resources').style.fontWeight = 'bold';
 }
<!-- ==========================================================================================================================================-->
<!-- ==========================================================================================================================================-->
 <!--Ein- und Ausblenden von Bildern/Videos im obern Picture-Content-Bereich der Seite-->
function show_emcotec_product_picture_01()
 {
  document.getElementById('emcotec_product_picture_01').style.display = 'block';
  document.getElementById('emcotec_product_picture_02').style.display = 'none';
  document.getElementById('emcotec_product_picture_03').style.display = 'none';
  document.getElementById('emcotec_product_picture_04').style.display = 'none';
  document.getElementById('emcotec_product_picture_05').style.display = 'none';
 }
 
 function show_emcotec_product_picture_02()
 {
  document.getElementById('emcotec_product_picture_01').style.display = 'none';
  document.getElementById('emcotec_product_picture_02').style.display = 'block';
  document.getElementById('emcotec_product_picture_03').style.display = 'none';
  document.getElementById('emcotec_product_picture_04').style.display = 'none';
  document.getElementById('emcotec_product_picture_05').style.display = 'none';
 }
 
 function show_emcotec_product_picture_03()
 {
  document.getElementById('emcotec_product_picture_01').style.display = 'none';
  document.getElementById('emcotec_product_picture_02').style.display = 'none';
  document.getElementById('emcotec_product_picture_03').style.display = 'block';
  document.getElementById('emcotec_product_picture_04').style.display = 'none';
  document.getElementById('emcotec_product_picture_05').style.display = 'none';
 }
 
 function show_emcotec_product_picture_04()
 {
  document.getElementById('emcotec_product_picture_01').style.display = 'none';
  document.getElementById('emcotec_product_picture_02').style.display = 'none';
  document.getElementById('emcotec_product_picture_03').style.display = 'none';
  document.getElementById('emcotec_product_picture_04').style.display = 'block';
  document.getElementById('emcotec_product_picture_05').style.display = 'none';
 }
 
 function show_emcotec_product_picture_05()
 {
  document.getElementById('emcotec_product_picture_01').style.display = 'none';
  document.getElementById('emcotec_product_picture_02').style.display = 'none';
  document.getElementById('emcotec_product_picture_03').style.display = 'none';
  document.getElementById('emcotec_product_picture_04').style.display = 'none';
  document.getElementById('emcotec_product_picture_05').style.display = 'block';
 }
<!-- ==========================================================================================================================================-->
<!-- ==========================================================================================================================================-->
 <!--Ein- und Ausblenden von der Content-DIVs auf den Sponsorpiloten-Seiten-->
function show_emcotec_content_pilot_page01()
 {
  document.getElementById('emcotec_content_pilot_page01').style.display = 'block';
  document.getElementById('emcotec_content_pilot_page02').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page03').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page04').style.display = 'none';
  document.getElementById('emcotec_content_link_pilot_page01').style.fontWeight = 'bold';
  document.getElementById('emcotec_content_link_pilot_page02').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page03').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page04').style.fontWeight = 'normal';
 }
 
 function show_emcotec_content_pilot_page02()
 {
  document.getElementById('emcotec_content_pilot_page01').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page02').style.display = 'block';
  document.getElementById('emcotec_content_pilot_page03').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page04').style.display = 'none';
  document.getElementById('emcotec_content_link_pilot_page01').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page02').style.fontWeight = 'bold';
  document.getElementById('emcotec_content_link_pilot_page03').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page04').style.fontWeight = 'normal';
 }
 
 function show_emcotec_content_pilot_page03()
 {
  document.getElementById('emcotec_content_pilot_page01').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page02').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page03').style.display = 'block';
  document.getElementById('emcotec_content_pilot_page04').style.display = 'none';
  document.getElementById('emcotec_content_link_pilot_page01').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page02').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page03').style.fontWeight = 'bold';
  document.getElementById('emcotec_content_link_pilot_page04').style.fontWeight = 'normal';
 }
 
 function show_emcotec_content_pilot_page04()
 {
  document.getElementById('emcotec_content_pilot_page01').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page02').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page03').style.display = 'none';
  document.getElementById('emcotec_content_pilot_page04').style.display = 'block';
  document.getElementById('emcotec_content_link_pilot_page01').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page02').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page03').style.fontWeight = 'normal';
  document.getElementById('emcotec_content_link_pilot_page04').style.fontWeight = 'bold';
 }
<!-- ==========================================================================================================================================-->
<!-- ==========================================================================================================================================-->
 <!--Ein- und Ausblenden von Bildern/Videos im obern Picture-Content-Bereich der Seite-->
function show_emcotec_pilot_picture_01()
 {
  document.getElementById('emcotec_pilot_picture_01').style.display = 'block';
  document.getElementById('emcotec_pilot_picture_02').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_03').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_04').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_05').style.display = 'none';
 }
 
 function show_emcotec_pilot_picture_02()
 {
  document.getElementById('emcotec_pilot_picture_01').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_02').style.display = 'block';
  document.getElementById('emcotec_pilot_picture_03').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_04').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_05').style.display = 'none';
 }
 
 function show_emcotec_pilot_picture_03()
 {
  document.getElementById('emcotec_pilot_picture_01').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_02').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_03').style.display = 'block';
  document.getElementById('emcotec_pilot_picture_04').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_05').style.display = 'none';
 }
 
 function show_emcotec_pilot_picture_04()
 {
  document.getElementById('emcotec_pilot_picture_01').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_02').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_03').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_04').style.display = 'block';
  document.getElementById('emcotec_pilot_picture_05').style.display = 'none';
 }
 
 function show_emcotec_pilot_picture_05()
 {
  document.getElementById('emcotec_pilot_picture_01').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_02').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_03').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_04').style.display = 'none';
  document.getElementById('emcotec_pilot_picture_05').style.display = 'block';
 }