var winB;
var winH;
var popWindow;
var winName;
var screenh = screen.availHeight/2;
var screenw = screen.availWidth/2;
function newWindow(winName,winID,winB,winH,scrollbars){
var winURL = winName;
if (! popWindow || popWindow.closed) {
popWindow = window.open(winURL,'popWindow','dependent,location=0,status=0,scrollBars='+scrollbars+',resizable=1,width='+winB+',height='+winH+',left='+(screenw-(winB/2))+',top='+(screenh-(winH/2)));
}
else{
popWindow.close();
popWindow = window.open(winURL,'popWindow','dependent,width='+winB+',height='+winH+',left=300,top=240');
popWindow.focus();
popWindow.location = winURL;
}
}

function getback(){
if(document.URL.toString() != document.referrer.toString()){
meineurl = document.URL.toString().split("/");
alteurl = document.referrer.toString().split("/");
i=0;
diff=0;
while(i<3){
if(meineurl[i] != alteurl[i]){
diff++;
}
i++;
}
if(diff <1){
document.getElementById("backbut").innerHTML = '<a href="'+document.referrer+'">&laquo; zur&uuml;ck</a>';
}
}
}