/**
 * Startet den SmartDrive Gastzugang
 */
function openGuestSmartDrive(){
    if (!isValidBrowser()){
        location.href = "incompatible-error.html";
    }else{
        var sdlocation = location.href.replace(/.*\?/, "//sd2.1und1.de/qxclient/?username=@nonymous&");
		// location.href.replace(/\/guest.html/, '/');
        var smartdrive_win = window.open(sdlocation, 'sdriveguest','width=800,height=600,scrollbars=no,resizable=yes');
    }
    return false;
}