function checktime() {

var thisday=new Date();

var hour=thisday.getHours();

if ((hour < 12) && (hour >=6))

{document.write("Good Morning!");}

if ((hour >= 12) && (hour < 18))

{document.write("Good Afternoon!");}

if ((hour >=18) && (hour < 22))

{document.write("Good Evening! I hope you have had a good day.");}

if ((hour >=22) || (hour < 4))

{document.write("It's late, you really ought to get to bed.");}

if ((hour >= 4) && (hour < 6))

{document.write("It's early, you shouldn't be up yet.");}

}