function $(id)
{
  return document.getElementById(id);
}

function checkEnter(event){ //e is event object passed from function invocation


  //if enter pressed,disable it
  if (event.keyCode == 13) {
    event.keyCode = null;
  }
  //if enter pressed,change the focus
  if (event.keyCode == 13) {
    event.keyCode = 9;
  }

}

function stopRKey(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 = stopRKey;