function LogoClick(){ var StartAudioNum = 1; var LastAudioNum = 13; var ranNum = Math.floor(Math.random()*(LastAudioNum-StartAudioNum))+StartAudioNum; window.parent.invisible.document.write(''); window.parent.invisible.document.close(); alert('Quit clicking me, I don\'t do anything, so go back to reading!'); window.parent.invisible.document.open(); window.parent.invisible.document.close(); }