var d = new Date();
var time = d.getHours();
if (time == 11)
    alert("Time to walk the dog!");
else if (time >= 22)
    alert("Yawn... It's late");
else if (time >= 19)
    alert("Time to get ready for bed");
else if (time >= 17)
    alert("Dinner Time");
else if (time >= 15)
    alert("TV Time!");
else if (time >= 12)
    alert("Lunch Time!");
else if (time >= 8)
    alert("Breakfast Time!");
else if (time >= 1)
    alert("Yawn... It's too early...");

best way I could shorten it =p