"reverse" in JavaScript [closed]

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From this cool post, one of the pieces of code is:

javascript:function flood(n) {if (self.moveBy) {for (i = 200; i >
0;i--){for (j = n; j > 0; j--) {self.moveBy(1,i);
self.moveBy(i,0);self.moveBy(0,-i); self.moveBy(-i,0); } }
}}flood(6);{ var inp = "D-X !msagro na dah tsuj resworb rouY"; var
outp = ""; for (i = 0; i <= inp.length; i++) {outp =inp.charAt (i)
+ outp ; } alert(outp) ;}; reverse

What is this reverse at the very end?

Edite开发者_如何学运维d Formatted Code From Above:

javascript:function flood(n) {
  if (self.moveBy) {
    for (i = 200; i >0;i--) {
      for (j = n; j > 0; j--) {
        self.moveBy(1,i);
        self.moveBy(i,0);
        self.moveBy(0,-i); 
        self.moveBy(-i,0); 
      }
    }
  }
}
flood(6); 
{
  var inp = "D-X !msagro na dah tsuj resworb rouY"; 
  var outp = ""; 
  for (i = 0; i <= inp.length; i++) {
    outp =inp.charAt (i) + outp ; 
  } 
  alert(outp);
}; 
reverse

---

It's not part of the javascript. It's a Reference Error most likely. Or in the context of the site, it's a typo.