function Arc() {
 if(document.getElementById)
   document.getElementById("AB1").style.visibility = "visible";
   document.getElementById("AB2").style.visibility = "visible";
   document.getElementById("AB3").style.visibility = "hidden";
   document.getElementById("AB4").style.visibility = "visible";
   document.getElementById("ABtext").firstChild.nodeValue = "Geben Sie Ihrem Objekt eine Perspektive";
   document.getElementById("SV1").style.visibility = "hidden";
   document.getElementById("SV2").style.visibility = "hidden";
   document.getElementById("SV3").style.visibility = "visible";
   document.getElementById("SV4").style.visibility = "hidden";
   document.getElementById("SVtext").firstChild.nodeValue = "Sachverständigentätigkeit";
   document.getElementById("P1").style.visibility = "hidden";
   document.getElementById("P2").style.visibility = "hidden";
   document.getElementById("P3").style.visibility = "visible";
   document.getElementById("P4").style.visibility = "hidden";
   document.getElementById("Ptext").firstChild.nodeValue = "Projektsteuerung und Projektmanagement";
}
function Sach() {
 if(document.getElementById)
   document.getElementById("AB1").style.visibility = "hidden";
   document.getElementById("AB2").style.visibility = "hidden";
   document.getElementById("AB3").style.visibility = "visible";
   document.getElementById("AB4").style.visibility = "hidden";
   document.getElementById("ABtext").firstChild.nodeValue = "Architektur und Bauplanung";
   document.getElementById("SV1").style.visibility = "visible";
   document.getElementById("SV2").style.visibility = "visible";
   document.getElementById("SV3").style.visibility = "hidden";
   document.getElementById("SV4").style.visibility = "visible";
   document.getElementById("SVtext").firstChild.nodeValue = "Beratung - Befundung - Gutachten";
   document.getElementById("P1").style.visibility = "hidden";
   document.getElementById("P2").style.visibility = "hidden";
   document.getElementById("P3").style.visibility = "visible";
   document.getElementById("P4").style.visibility = "hidden";
   document.getElementById("Ptext").firstChild.nodeValue = "Projektsteuerung und Projektmanagement";
}
function Pro() {
 if(document.getElementById)
   document.getElementById("AB1").style.visibility = "hidden";
   document.getElementById("AB2").style.visibility = "hidden";
   document.getElementById("AB3").style.visibility = "visible";
   document.getElementById("AB4").style.visibility = "hidden";
   document.getElementById("ABtext").firstChild.nodeValue = "Architektur und Bauplanung";
   document.getElementById("SV1").style.visibility = "hidden";
   document.getElementById("SV2").style.visibility = "hidden";
   document.getElementById("SV3").style.visibility = "visible";
   document.getElementById("SV4").style.visibility = "hidden";
   document.getElementById("SVtext").firstChild.nodeValue = "Sachverständigentätigkeit";
   document.getElementById("P1").style.visibility = "visible";
   document.getElementById("P2").style.visibility = "visible";
   document.getElementById("P3").style.visibility = "hidden";
   document.getElementById("P4").style.visibility = "visible";
   document.getElementById("Ptext").firstChild.nodeValue = "Baustellenkoordination und Energieausweise";
}