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