// we need to know if this is IE or something else, we'll use document.all because it seems
// to work but I don't like using a test that isn't really applicable to the work (PFB 7/22/2010)

if (document.all) {
   document.onkeydown = MicrosoftEventHandler_KeyDown;
}
else {
   window.captureEvents(Event.KEYDOWN);
   window.onkeydown = NetscapeEventHandler_KeyDown;
}

function NetscapeEventHandler_KeyDown(e) {  
  if (e.which == 13 && e.target.type != 'textarea' && e.target.type != 'submit') 
  { 
    __doPostBack(defaultButtonID,'');
  }
  return true;
}

function MicrosoftEventHandler_KeyDown() {
  if (event.keyCode == 13 && event.srcElement.type != 'textarea' && event.srcElement.type != 'submit'){
    __doPostBack(defaultButtonID,'');
	return false;
  }
  return true;
}