function makeArray() { 
for (i = 0; i < makeArray.arguments.length; i++) 
  this[i + 1] = makeArray.arguments[i]; 
}

var modifiedMonth = new makeArray('January','February','March','April',
                          'May','June','July','August','September',
                          'October','November','December');

var modifiedDate = new Date(document.lastModified);

document.write('Last Modified : ' + modifiedMonth[modifiedDate.getMonth() + 1] + ' ' + 
                                  modifiedDate.getDate() + ', ' + 
                                  modifiedDate.getFullYear());