ladestart = new Date();

function ladezeit()
{
 current = new Date();
 dtime = current.getTime() - ladestart.getTime();
 loadtime = dtime/1000 +" Sekunden";
 document.getElementById("Ladezeit-Anzeige").innerHTML = loadtime;
}


// JavaScript Tabs

function tabSwitch_2(active, number, tab_prefix, content_prefix) {  

for (var i=1; i < number+1; i++) {  
	document.getElementById(content_prefix+i).style.display = 'none';  
	document.getElementById(tab_prefix+i).className = '';  
}  
document.getElementById(content_prefix+active).style.display = 'block';  
document.getElementById(tab_prefix+active).className = 'on';      
       
}