<!--

now = new Date()
tm  = now.getHours()
if ( tm > 3 && tm < 9 )   bg="img/001.gif"
if ( tm > 8 && tm < 16 )  bg="img/002.gif"
if ( tm > 15 && tm < 19 ) bg="img/003.gif"
if ( tm > 18 || tm < 4 )  bg="img/005.gif"
document.write("<BODY BACKGROUND=" + bg + ">")

//-->