function displaygreeting()
{
var d = new Date();
var h = d.getHours();
if (h < 12) document.write("<img src=\"/images/goodmorning.gif\" />");
else if (h < 18) document.write("<img src=\"/images/goodafternoon.gif\" />");
else document.write("<img src=\"/images/goodevening.gif\" />");
}