function toggle( targetId ){ 
  if (document.getElementById){ 
        target = document.getElementById( targetId ); 
           if (target.style.display == "none"){ 
              target.style.display = ""; 
           } else { 
              target.style.display = "none"; 
           } 
     } 
}

function hide( targetId ){ 
        target = document.getElementById( targetId ); 
              target.style.display = "none"; 
}

function show( targetId ){ 
        target = document.getElementById( targetId ); 
              target.style.display = ""; 
}

function toggleMenu( targetId, target2Id ){ 
  document.getElementById( 'menu1').style.backgroundColor='#efecde';
  document.getElementById( 'menu2').style.backgroundColor='#efecde';
  document.getElementById( 'menu3').style.backgroundColor='#efecde';
  document.getElementById( 'menu4').style.backgroundColor='#efecde';
  document.getElementById( 'menu1').style.color='#000000';
  document.getElementById( 'menu2').style.color='#000000';
  document.getElementById( 'menu3').style.color='#000000';
  document.getElementById( 'menu4').style.color='#000000';
  document.getElementById( 'menu1').style.border='0';
  document.getElementById( 'menu2').style.border='0';
  document.getElementById( 'menu3').style.border='0';
  document.getElementById( 'menu4').style.border='0';


  if (document.getElementById){ 
        target = document.getElementById( targetId ); 
           if (target.style.display == "none"){ 
              target.style.display = ""; 
           } else { 
              target.style.display = "none"; 
           } 
        target2 = document.getElementById( target2Id ); 
           if (target.style.display == ""){ 
              target2.style.backgroundColor="#0000ff"; 
              target2.style.color="#ffffff"; 
              target2.style.border="1px solid #cecec3";
           } 
           
     } 
     if (targetId!='Menu_Algemeen') {document.getElementById( 'Menu_Algemeen' ).style.display="none";}
     if (targetId!='Menu_Menu') {document.getElementById( 'Menu_Menu' ).style.display="none";}
     if (targetId!='Menu_SEO') {document.getElementById( 'Menu_SEO' ).style.display="none";}
     if (targetId!='Menu_Site') {document.getElementById( 'Menu_Site' ).style.display="none";}
}