如何根据另一个下拉列表将dropdownlist更改为textbox，反之亦然

Question

I am developing an application where I am using country (dropdown list) and state (dropdown list).

The question is when 1 select country, it's states will be populated in state dropdownlist but the state list is only provided for USA and other countries are not provided so they have to type in.

So how to change state input type (TEXTBOX OR DROPDOWNLIST) based on USA (country). That is

If USA -DROPDOWNLIST Else Other Countries -TEXTBOX

Answer 1

I would make is a select box by default, then use this jQuery to alter it.

if($(#country_select).val() != 'USA'){
  $('#selectbox').attr('type', 'textbox');
  $('#selectbox option').remove();
}

NOTE

This is a very simple solution, and requires that the default value is USA. I think there is enough info there to build a more robust solution.