Prevent submitting form by hitting enter # ref. http://webcheatsheet.com/javascript/disable_enter_key.php

stopReturnKey.js

function stopReturnKey(evt) { 
  var evt = (evt) ? evt : ((event) ? event : null); 
  var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null); 
  if ((evt.keyCode == 13) && (node.type=="text"))  {return false;} 
} 

document.onkeypress = stopReturnKey;