var loc = top.location.href;
var flag = 0;
var OK = false;

loc = loc.toLowerCase();

if (loc.search(/file:/) != -1) {
    OK = true;
} else {
    if (loc == "http://www.stephan-pilz.de") {
        OK = true;
    }
    if (loc == "http://www.stephan-pilz.de/") {
        OK = true;
    }
    if (loc == "http://www.stephanpilz.de") {
        OK = true;
    }
    if (loc == "http://www.stephanpilz.de/") {
        OK = true;
    }
    if (loc == "http://www.stephan-pilz.de/index.htm") {
        OK = true;
    }
    if (loc == "http://www.stephan-pilz.de/index.htm") {
        OK = true;
    }
}
if (OK == false) {
    top.location.href="http://www.stephan-pilz.de";
    //alert (top.path);
}