if (logsrc != '') {
    
    var jetzt = new Date();
    var rand  = jetzt.getTime() + Math.round(Math.random());
    document.writeln('<script language="Javascript">');
    document.writeln('logimg'+rand+' = new Image(1, 1);');
    document.writeln('logimg'+rand+'.src = logsrc;');
    document.writeln('</script>');
}