var req = new XMLHttpRequest();
url = "http://slug.realraum.at/cgi-bin/switch.cgi?power=send&id="+btn;
req.open("GET", url ,false);
var req = new XMLHttpRequest();
url = "http://slug.realraum.at/cgi-bin/switch.cgi?power=send&id="+btn;
req.open("GET", url ,false);