function checkEnter(e,obj){ 
  if(e && e.which){ 
    e = e;
    characterCode = e.which;
  } else {
    e = event;
    characterCode = e.keyCode;
  }
 
  if(characterCode == 13){
		if (obj.value.length>=3) {
	    location.href='/search/'+obj.value+'/';
		} else {
			alert('Search term must contain at least 3 characters.');
		}
    return false;
  } else {
    return true;
  }
}