day = new Date();
hr = day.getHours();
if ((hr == 4) || (hr == 5) || (hr == 6) || (hr ==7) || (hr ==8) || (hr == 9) || (hr ==10))
document.write('<img src="/images/welcome/guten_morgen.gif" alt="Guten Morgen" width="590" height="55" />');
if ((hr ==11) || (hr ==12) || (hr == 13) || (hr ==14) || (hr==15) || (hr==16) || (hr==17))
document.write('<img src="/images/welcome/guten_tag.gif" alt="Guten Tag" width="590" height="55" />');
if ((hr==18) || (hr==19) || (hr==20) || (hr==21) || (hr==22) || (hr==23) || (hr==0)|| (hr ==1) || (hr ==2) || (hr ==3))
document.write('<img src="/images/welcome/guten_abend.gif" alt="Guten Abend" width="590" height="55" />');