function ShowTab(tabname)
{
    switch(tabname)
    {
        case "anschreiben":
            document.getElementById("tab_anschreiben").style.display = "block";
            document.getElementById("tab_kontakt").style.display = "none";
            document.getElementById("tab_person").style.display = "none";
            document.getElementById("tab_mobil").style.display = "none";
            document.getElementById("tab_schule").style.display = "none";
            document.getElementById("tab_lebenslauf").style.display = "none";
            document.getElementById("tab_sonstiges").style.display = "none";
            
            document.getElementById("anschreiben_tab").style.color = "red";
            document.getElementById("kontakt_tab").style.color = "black";
            document.getElementById("person_tab").style.color = "black";
            document.getElementById("mobil_tab").style.color = "black";
            document.getElementById("schule_tab").style.color = "black";
            document.getElementById("lebenslauf_tab").style.color = "black";
            document.getElementById("sonstiges_tab").style.color = "black";
            
            document.getElementById("button_leiste_anschreiben").style.display = "block";
            document.getElementById("button_leiste_kontakt").style.display = "none";
            document.getElementById("button_leiste_person").style.display = "none";
            document.getElementById("button_leiste_mobil").style.display = "none";
            document.getElementById("button_leiste_schule").style.display = "none";
            document.getElementById("button_leiste_lebenslauf").style.display = "none";
            document.getElementById("button_leiste_sonstiges").style.display = "none";
            
            break;
        case "kontakt":
            document.getElementById("tab_anschreiben").style.display = "none";
            document.getElementById("tab_kontakt").style.display = "block";
            document.getElementById("tab_person").style.display = "none";
            document.getElementById("tab_mobil").style.display = "none";
            document.getElementById("tab_schule").style.display = "none";
            document.getElementById("tab_lebenslauf").style.display = "none";
            document.getElementById("tab_sonstiges").style.display = "none";
            
            document.getElementById("anschreiben_tab").style.color = "black";
            document.getElementById("kontakt_tab").style.color = "red";
            document.getElementById("person_tab").style.color = "black";
            document.getElementById("mobil_tab").style.color = "black";
            document.getElementById("schule_tab").style.color = "black";
            document.getElementById("lebenslauf_tab").style.color = "black";
            document.getElementById("sonstiges_tab").style.color = "black";
            
            document.getElementById("button_leiste_anschreiben").style.display = "none";
            document.getElementById("button_leiste_kontakt").style.display = "block";
            document.getElementById("button_leiste_person").style.display = "none";
            document.getElementById("button_leiste_mobil").style.display = "none";
            document.getElementById("button_leiste_schule").style.display = "none";
            document.getElementById("button_leiste_lebenslauf").style.display = "none";
            document.getElementById("button_leiste_sonstiges").style.display = "none";
            
            break;
        case "person":
            document.getElementById("tab_anschreiben").style.display = "none";
            document.getElementById("tab_kontakt").style.display = "none";
            document.getElementById("tab_person").style.display = "block";
            document.getElementById("tab_mobil").style.display = "none";
            document.getElementById("tab_schule").style.display = "none";
            document.getElementById("tab_lebenslauf").style.display = "none";
            document.getElementById("tab_sonstiges").style.display = "none";
            
            document.getElementById("anschreiben_tab").style.color = "black";
            document.getElementById("kontakt_tab").style.color = "black";
            document.getElementById("person_tab").style.color = "red";
            document.getElementById("mobil_tab").style.color = "black";
            document.getElementById("schule_tab").style.color = "black";
            document.getElementById("lebenslauf_tab").style.color = "black";
            document.getElementById("sonstiges_tab").style.color = "black";
            
            document.getElementById("button_leiste_anschreiben").style.display = "none";
            document.getElementById("button_leiste_kontakt").style.display = "none";
            document.getElementById("button_leiste_person").style.display = "block";
            document.getElementById("button_leiste_mobil").style.display = "none";
            document.getElementById("button_leiste_schule").style.display = "none";
            document.getElementById("button_leiste_lebenslauf").style.display = "none";
            document.getElementById("button_leiste_sonstiges").style.display = "none";
            
            break;
        case "mobil":
            document.getElementById("tab_anschreiben").style.display = "none";
            document.getElementById("tab_kontakt").style.display = "none";
            document.getElementById("tab_person").style.display = "none";
            document.getElementById("tab_mobil").style.display = "block";
            document.getElementById("tab_schule").style.display = "none";
            document.getElementById("tab_lebenslauf").style.display = "none";
            document.getElementById("tab_sonstiges").style.display = "none";
            
            document.getElementById("anschreiben_tab").style.color = "black";
            document.getElementById("kontakt_tab").style.color = "black";
            document.getElementById("person_tab").style.color = "black";
            document.getElementById("mobil_tab").style.color = "red";
            document.getElementById("schule_tab").style.color = "black";
            document.getElementById("lebenslauf_tab").style.color = "black";
            document.getElementById("sonstiges_tab").style.color = "black";
            
            document.getElementById("button_leiste_anschreiben").style.display = "none";
            document.getElementById("button_leiste_kontakt").style.display = "none";
            document.getElementById("button_leiste_person").style.display = "none";
            document.getElementById("button_leiste_mobil").style.display = "block";
            document.getElementById("button_leiste_schule").style.display = "none";
            document.getElementById("button_leiste_lebenslauf").style.display = "none";
            document.getElementById("button_leiste_sonstiges").style.display = "none";
            
            break;
        case "schule":
            document.getElementById("tab_anschreiben").style.display = "none";
            document.getElementById("tab_kontakt").style.display = "none";
            document.getElementById("tab_person").style.display = "none";
            document.getElementById("tab_mobil").style.display = "none";
            document.getElementById("tab_schule").style.display = "block";
            document.getElementById("tab_lebenslauf").style.display = "none";
            document.getElementById("tab_sonstiges").style.display = "none";
            
            document.getElementById("anschreiben_tab").style.color = "black";
            document.getElementById("kontakt_tab").style.color = "black";
            document.getElementById("person_tab").style.color = "black";
            document.getElementById("mobil_tab").style.color = "black";
            document.getElementById("schule_tab").style.color = "red";
            document.getElementById("lebenslauf_tab").style.color = "black";
            document.getElementById("sonstiges_tab").style.color = "black";
            
            document.getElementById("button_leiste_anschreiben").style.display = "none";
            document.getElementById("button_leiste_kontakt").style.display = "none";
            document.getElementById("button_leiste_person").style.display = "none";
            document.getElementById("button_leiste_mobil").style.display = "none";
            document.getElementById("button_leiste_schule").style.display = "block";
            document.getElementById("button_leiste_lebenslauf").style.display = "none";
            document.getElementById("button_leiste_sonstiges").style.display = "none";
            
            break;
        case "lebenslauf":
            document.getElementById("tab_anschreiben").style.display = "none";
            document.getElementById("tab_kontakt").style.display = "none";
            document.getElementById("tab_person").style.display = "none";
            
            document.getElementById("tab_mobil").style.display = "none";
            document.getElementById("tab_schule").style.display = "none";
            document.getElementById("tab_lebenslauf").style.display = "block";
            document.getElementById("tab_sonstiges").style.display = "none";
            
            document.getElementById("anschreiben_tab").style.color = "black";
            document.getElementById("kontakt_tab").style.color = "black";
            document.getElementById("person_tab").style.color = "black";
            document.getElementById("mobil_tab").style.color = "black";
            document.getElementById("schule_tab").style.color = "black";
            document.getElementById("lebenslauf_tab").style.color = "red";
            document.getElementById("sonstiges_tab").style.color = "black";
            
            document.getElementById("button_leiste_anschreiben").style.display = "none";
            document.getElementById("button_leiste_kontakt").style.display = "none";
            document.getElementById("button_leiste_person").style.display = "none";
            document.getElementById("button_leiste_mobil").style.display = "none";
            document.getElementById("button_leiste_schule").style.display = "none";
            document.getElementById("button_leiste_lebenslauf").style.display = "block";
            document.getElementById("button_leiste_sonstiges").style.display = "none";
            
            break;
        case "sonstiges":
            document.getElementById("tab_anschreiben").style.display = "none";
            document.getElementById("tab_kontakt").style.display = "none";
            document.getElementById("tab_person").style.display = "none";
            document.getElementById("tab_mobil").style.display = "none";
            document.getElementById("tab_schule").style.display = "none";
            document.getElementById("tab_lebenslauf").style.display = "none";
            document.getElementById("tab_sonstiges").style.display = "block";
            
            document.getElementById("anschreiben_tab").style.color = "black";
            document.getElementById("kontakt_tab").style.color = "black";
            document.getElementById("person_tab").style.color = "black";
            document.getElementById("mobil_tab").style.color = "black";
            document.getElementById("schule_tab").style.color = "black";
            document.getElementById("lebenslauf_tab").style.color = "black";
            document.getElementById("sonstiges_tab").style.color = "red";
            
            document.getElementById("button_leiste_anschreiben").style.display = "none";
            document.getElementById("button_leiste_kontakt").style.display = "none";
            document.getElementById("button_leiste_person").style.display = "none";
            document.getElementById("button_leiste_mobil").style.display = "none";
            document.getElementById("button_leiste_schule").style.display = "none";
            document.getElementById("button_leiste_lebenslauf").style.display = "none";
            document.getElementById("button_leiste_sonstiges").style.display = "block";
            
            break;
        default:
            alert('Diese Option ist nicht verfügbar, bitte wenden Sie sich an den Entwickler unter kontakt@hiller-it.de');
            break;
    }
}