請各位指點一下迷津

Question

function checkUser()
  {
     if(!check (new_form,customers_email,'請輸入您的賬號!')) return false;
     //要及时中断
     if(!check (new_form,customers_password,'請輸入您的密碼!')) return false;
     return ture;
  }
 function check (form_name,field_name,text)
  { 
    if (document.form_name.field_name.value=="")
       {
         alert("text");
         document.form_name.field_name.focus();
         return false;
       }
    return true;
  }