gistfile1.js

var names, array, size, order, str, sort, reverse, rev;

names = prompt("Please input names separated by spaces: ", "");
order = prompt("What order? (ascending or descending)", "");
array = names.split(/\s+/);
size = array.length;

if (names == "" || names == null) 
  { document.write("Oops, you did not enter a name, please enter a name!"); }
else if (names != "" && names != null) 
  { document.write("You have entered the following names: " + "<br />"); } 
for (var i = 0; i < array.length; i++) 
  { document.write(array[i] + "<br />"); }  

document.write("<br />" + "-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-" + "<br />" + "<br />");

if (order == "")
  { document.write("Error - order is incorrectly specified!"); } 
else if (order == null) 
  { document.write("Error - order is incorrectly specified!"); } 

str = order.toLowerCase();
if (str == "ascending") { sort() }
else if (str == "descending") { rev() }

function sort() { 
if (str == "ascending" ) 
  { sort = array.sort(); document.write("Here are the names in Ascending order: " + "<br />"); }
else if (str != "ascending")
  { document.write("Error - order is incorrectly specified!"); } 
for (var i = 0; i < array.length; i++) 
  { document.write(sort[i] + "<br />"); } 
}

function rev() { 
if (str == "descending") 
  { rev = array.reverse(); document.write("Here are the names in Descending order: " + "<br />"); }
else if (str != "descending")
  { document.write("Error - order is incorrectly specified!"); } 
for (var i = 0; i < array.length; i++) 
  { document.write(rev[i] + "<br />"); } 
}