function browser(e) {
var text="other";
if(navigator.appname.indexof("Netscape") != -1) {text="firefox";}
if(navigator.appname.indexof("Opera") != -1) {text="opera";}
if(navigator.appname.indexof("Microsoft Internet") != -1) {text="explorer";}
return text;
}

function mittig() {
var browserbreit = 0; 
browserbreit = screen.availWidth;
var breite =0; 
breite = (browserbreit-800)/2;
breite = Math.round(breite); 
document.getElementById("anzeiger").style.left = breite; 
document.getElementById("terminieren").style.left = breite+15; 
return true;
}