day=new Array("Sun", "Mon", "Tues", "Wed", "Thu", "Fri", "Sat");
mnth=new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"); 
lastModdate=new Date(document.lastModified);

if (lastModdate == "") document.write('Last updated on Unknown');
else with (lastModdate) document.write('Page last modified on ' + day[getDay()] + ' ' + getDate() + ' ' + mnth[getMonth()] + ' ' + getFullYear());