var months = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
var dateNow = new Date();
var yearNow = dateNow.getFullYear();
var monthNow = dateNow.getMonth();
var dayNow = dateNow.getDate();
var daySuffix;

switch(dayNow)
{
case 1:
case 21:
case 31: 
 daySuffix = "st"; 
break;
case 2:
case 22:
 daySuffix = "nd"; 
break;
case 3:
case 23:
 daySuffix = "ed"; 
break;
default:
 daySuffix = "th"; 
break;
}
var greeting;
var nowHour = dateNow.getHours();
var nowMinute = dateNow.getMinutes();
var nowSecond = dateNow.getSeconds();

if(nowMinute < 10){
nowMinute = "0"+nowMinute;
}
if(nowSecond < 10){
nowSecond = "0"+nowSecond;
}
if(nowHour < 12){
greeting = "Good Morning!";
}
else if(nowHour < 17){
greeting = "Good Afternoon";
} else
{
greeting = "Good Evening!";
}

<!--document.write("<font color='#C71585'>");-->
document.write("<font color='#339900'>");
document.write(dayNow+daySuffix);
document.write("-");
document.write(months[monthNow]);
document.write("-");
document.write(yearNow);
document.write(" ");
document.write(nowHour + ":" + nowMinute + ":" + nowSecond);
document.write("</font>");
document.write("<br />");
document.write("<font color='#990000'>");
document.write(greeting+"!"+" Welcome to my Website!");
document.write("</font>");