var loginInputCtrl = {
  event : function ( e )
  {
    loginInputCtrl[this.name]( this,e.type );
  },
  
  loginname : function (obj,action)
  {
    if(action=="focus"){
      obj.value = (obj.value=="用户名" ? "" : obj.value);
      obj.className = "textbox focus";
    } else if(action=="blur" && obj.value==""){
      obj.value = "用户名";
      obj.className = "textbox";
    }
  },
  
  password : function(obj,action)
  {
    if(action=="focus"){
      obj.className = "textbox focus";
    } else if(action=="blur" && obj.value==""){
      obj.className = "textbox pwdtext";
    }
  }
}

// 用户登陆检查
function _login(form) {
  try {

    if ( form.loginname.value == "" || form.loginname.value == "用户名" ) {
      throw "请正确填写您的用户名。";
    }

    if ( form.password.value == "" ) {
      throw "请正确填写您的密码。";
    }

    form.refer.value = location.href;
    
    return true;
  } catch ( e ) {
    alert( e );
    form.loginname.focus();
    return false;
  }
}