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 = months[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 = "rd";
   break;
default:
   daySuffix = "th";
   break;
}