onerror = stopError;
function stopError()
{
return true;
}


function changeID(id,name) {
   if (document.getElementById)
  	{	
 		document.getElementById(id).className = name;
	}
   else {}
}

function desktopchange()	
	{
	changeID('desktop','desktopmark');
	changeID('desktoplink','startlink');
	changeID('serverlink','serverstart');
	changeID('netzwerklink','netzwerkstart');
	changeID('softwarelink','softwarestart');
	}
function netzwerkchange()	
	{
	changeID('netzwerk','netzwerkmark');
	changeID('netzwerklink','startlink');
	changeID('desktoplink','desktopstart');
	changeID('serverlink','serverstart');
	changeID('softwarelink','softwarestart');
	}	
function serverchange()	
	{
	changeID('server','servermark');
	changeID('serverlink','startlink');
	changeID('desktoplink','desktopstart');
	changeID('netzwerklink','netzwerkstart');
	changeID('softwarelink','softwarestart');
	}		
function softwarechange()	
	{
	changeID('software','softwaremark');
	changeID('softwarelink','startlink');
	changeID('desktoplink','desktopstart');
	changeID('serverlink','serverstart');
	changeID('netzwerklink','netzwerkstart');
	}		
	
	
function restore()	
	{
	changeID('netzwerklink','startlink');
	changeID('desktoplink','startlink');
	changeID('serverlink','startlink');
	changeID('softwarelink','startlink');
	changeID('desktop','desktop');
	changeID('netzwerk','netzwerk');
	changeID('server','server');
	changeID('software','software');
	}
	
function displayDesktop() 
	{
	document.getElementById('contentbox0').style.display= 'none';
	document.getElementById('contentbox1').style.display= 'block';
	document.getElementById('contentbox2').style.display= 'none';
	document.getElementById('contentbox3').style.display= 'none';
	document.getElementById('contentbox4').style.display= 'none';
	}
		
function displayServer() 
	{
	document.getElementById('contentbox0').style.display= 'none';
	document.getElementById('contentbox1').style.display= 'none';
	document.getElementById('contentbox2').style.display= 'block';
	document.getElementById('contentbox3').style.display= 'none';
	document.getElementById('contentbox4').style.display= 'none';
	}	
function displayNetzwerk() 
	{
	document.getElementById('contentbox0').style.display= 'none';
	document.getElementById('contentbox1').style.display= 'none';
	document.getElementById('contentbox2').style.display= 'none';
	document.getElementById('contentbox3').style.display= 'block';
	document.getElementById('contentbox4').style.display= 'none';
	}
function displaySoftware() 
	{
	document.getElementById('contentbox0').style.display= 'none';
	document.getElementById('contentbox1').style.display= 'none';
	document.getElementById('contentbox2').style.display= 'none';
	document.getElementById('contentbox3').style.display= 'none';
	document.getElementById('contentbox4').style.display= 'block';
	}	
	
	
	
function display0()
	{
	document.getElementById('contentbox0').style.display= 'block';
	document.getElementById('contentbox1').style.display= 'none';
	document.getElementById('contentbox2').style.display= 'none';
	document.getElementById('contentbox3').style.display= 'none';
	document.getElementById('contentbox4').style.display= 'none';
	
	}