function clearHighlights()
    {
      document.getElementById("home").className = "zoneDivHide";
      document.getElementById("link").className = "zoneDivHide";
      document.getElementById("inspiratie").className = "zoneDivHide";
      document.getElementById("inspiratie2").className = "zoneDivHide";
      document.getElementById("kontakt").className = "zoneDivHide";
      document.getElementById("tekst_teken").className = "zoneDivHide";
      document.getElementById("portfolio").className = "zoneDivHide";
      document.getElementById("prijs").className = "zoneDivHide";
      document.getElementById("seo").className = "zoneDivHide";
      document.getElementById("vertalen").className = "zoneDivHide";
      document.getElementById("redigeren").className = "zoneDivHide";
      document.getElementById("slogans").className = "zoneDivHide";
    }

    function showContent(show){
      document.getElementById("content_home").style.display="none";
      document.getElementById("content_link").style.display="none";
      document.getElementById("content_inspiratie").style.display="none";
      document.getElementById("content_kontakt").style.display="none";
      document.getElementById("content_seo").style.display="none";
      document.getElementById("content_vertalen").style.display="none";
      document.getElementById("content_redigeren").style.display="none";
      document.getElementById("content_slogans").style.display="none";
      document.getElementById("content_portfolio").style.display="none";
      document.getElementById("content_portfolio_detail").style.display="none";
      document.getElementById("content_inspiratie_detail").style.display="none";
      document.getElementById("content_prijs").style.display="none";
      
      switch(show){
        case 0 :   document.getElementById("content_home").style.display="block";
                  break;
        case 1 :   document.getElementById("content_link").style.display="block";
                  break;
        case 2 :   document.getElementById("content_inspiratie").style.display="block";
                  break;
        case 3 :   document.getElementById("content_inspiratie").style.display="block";
                  break;
        case 4 :  document.getElementById("content_kontakt").style.display="block";
                  break;
        case 5 :   document.getElementById("content_seo").style.display="block";
                  break;
        case 6 :   document.getElementById("content_portfolio").style.display="block";
                  break;
        case 7 :   document.getElementById("content_prijs").style.display="block";
                  break;
        case 8 :  document.getElementById("content_portfolio").style.display="none";
        		  document.getElementById("content_portfolio_detail").style.display="block";
                  break;         
        case 9 :  document.getElementById("content_inspiratie").style.display="none";
       			  document.getElementById("content_inspiratie_detail").style.display="block";
		          break;    		   
        case 10 : document.getElementById("content_vertalen").style.display="block";
                  break;
        case 11 : document.getElementById("content_redigeren").style.display="block";
                  break;
		case 12 : document.getElementById("content_slogans").style.display="block";
                  break;		            
      }
    }