var KeyBoardHelper = {
  //get key code
  GetKeyCode: function(e) {
    var code;

    if (!e) var e = window.event;

    if (!e) e = window.event;
    if (e.keyCode) code = e.keyCode;
    else if (e.which) code = e.which;

    return code;
  },

  IsMaxLength: function(fieldId) {
    var field = $(fieldId);
    var length = field.getAttribute("maxlength");
    if (length != null && length != "" && field.getAttribute("length") > length)
      field.value = field.value.substring(0, length);
  }
};