if (document.observe) document.observe("dom:loaded", function() {

});

function greeting()
{
   var today = new Date();
   var hrs = today.getHours();
   document.write("Goede");
   if (hrs < 12)
      document.write("morgen ");
   else if (hrs <= 17)
      document.write("middag ");
   else
      document.write("navond ");
}