Get name of field being passed

Hello,

I have two sets of lists (state lists) One called state_o and one called state_d and I have a function I do on them

function selectCountry(sel) {
    document.getElementById("country_o").selectedIndex = states[sel.value];
}

Now what I want to do is determine if the "sel" is state_o or state_d and change the getElementById("country_o") to either _o or _d depending on what state is selected, so state_o would do country_o and state_d would do country_d

How can I determine the select field name?

Thanks!

From stackoverflow

• Keep another parameter in this function to see if its _o or _d and set this value in calling function. then in your javascript method you can call country by -

  document.getElementById("country" + param2)
  

  Assuming param2 is that additional parameter and it will contain string "_o" or "_d"

• Use sel.attr('name') if you're using jQuery or sel.name if just using plain old Javascript

  Assuming you have:

  <SELECT name='state_o'>
    <OPTION value='blah'>BLAH</OPTION>
  </SELECT>
  <SELECT name='state_d'>
    <OPTION value='blah'>BLAH</OPTION>
  </SELECT>
  

  Andy E : *attr()* isn't a valid function on any DOM object.

  Ravindra Sane : $(sel),attr("name") should do it

• If I've understood your question right, it's just:

  var field;
  if (sel.value == 'state_o')
      field = 'country_o';
  else
      field = 'country_d';
  
  document.getElementById(field).selectedIndex = states[sel.value];
  

• You can access the name property through javascript:

  function selectCountry(sel) {
      var od = sel.name == "state_o" ? "o" : "d";
      document.getElementById("country_"+od).selectedIndex = states[sel.value];
  }
  

  Or if you want to be a bit fancier and keep it on one line, slice the o/d straight from the name string:

  function selectCountry(sel) {
      document.getElementById("country_"+sel.name.slice(-1)).selectedIndex = states[sel.value];
  }
  

  Jason McCreary : +1 Nice clean function update.

• If sel is the select element, sel.id or sel.name should give you what you want.