How to get a value from a combobox in javascript

Question

I have this function and I want to make the var category to have the value of the combobox that has the id #ticket_category_clone

What am I doing wrong?

   function check () {
      var category="#ticket_category_clone";
          if (category=="Hardware")
      {
      SPICEWORKS.utils.addStyle('#ticket_c_hardware_clone{display: none !important;}');
      }
    }

    SPICEWORKS.app.helpdesk.ready(check);

edit

It only alerts if I make the code this way:

function check () {
    // var category = document.getElementById('#ticket_c_hardware_clone').value;
   var category ="Hardware";
   alert(category)
          if (category=="Hardware")
      {
        SPICEWORKS.utils.addStyle('#ticket_c_hardware_clone{display: none !important;}');


      }
   alert(category)
    }

SPICEWORKS.app.helpdesk.ready(check);

like this? http://img12.imageshack.us/img12/8438/semttuloluu.png

and the code:

<select id="ticket_category_clone" name="ticket[category]" hdpp="ticket_category"><option value=""></option>

Shadow The GPT Wizard · Accepted Answer · 2012-04-03T13:50:25.043

1

Dunno about spiceworks but in JavaScript that's how you can do that:

var category = document.getElementById("ticket_category_clone").value;

If the # is part of the id, add it as well but note it's not valid ID:

var category = document.getElementById("#ticket_category_clone").value;

Looks like you need some debugging. Try the following code:

var category = "";
var ddl = document.getElementById("ticket_category_clone");
if (ddl) {
    alert("found (1)");
    category = ddl.value;
} else {
    ddl = document.getElementById("#ticket_category_clone");
    if (ddl) {
        alert("found (2)");
        category = ddl.value;
    } else {
        alert("element can't be found");
    }
}
alert(category);

What alerts you get?

edited Apr 03 '12 at 13:50

answered Apr 03 '12 at 11:21

Shadow The GPT Wizard

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the value can be a text or numbers or threes not problem with that? – user181891 Apr 03 '12 at 11:29
The type will always be string (text) so to treat it differently you'll have to convert. For example to treat it as number use `parseInt` or `parseFloat`. – Shadow The GPT Wizard Apr 03 '12 at 12:11
the value of the combobox its always a text so theres no problem with that ? – user181891 Apr 03 '12 at 12:40
No, there should be no problems. – Shadow The GPT Wizard Apr 03 '12 at 12:42
then theres some thing else wrong because it not doing anything – user181891 Apr 03 '12 at 12:57
To make sure it has correct value add `alert(category)` to the code - do you see the proper value? – Shadow The GPT Wizard Apr 03 '12 at 13:25
Can you post the HTML source? You need to find the actual and real id of the element. – Shadow The GPT Wizard Apr 03 '12 at 13:55
I fear it means the drop down is not part of the current document. Add this to your function: `alert("found " + document.getElementsByTagName("select").length + " drop downs");` what you see? – Shadow The GPT Wizard Apr 03 '12 at 14:15
So it's Spiceworks issue after all - you need some way to access the actual document. You might have more luck in [their official forums](http://community.spiceworks.com) – Shadow The GPT Wizard Apr 03 '12 at 14:31
if i get here the code of the plugin that makes those subs it may help? – user181891 Apr 03 '12 at 14:41
No man sorry - reverse engineering the framework doesn't sound like valid option. Sorry for not spotting this earlier. – Shadow The GPT Wizard Apr 03 '12 at 15:00

score 0 · Answer 2 · edited Aug 02 '12 at 14:07

0

Can you test with this lines?

var e = document.getElementById(""#ticket_category_clone");
var str = e.options[e.selectedIndex].text;

alert(str), if you get the value you want?

edited Aug 02 '12 at 14:07

GDP

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answered Apr 03 '12 at 21:05

R063R

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score 0 · Answer 3 · answered Aug 16 '14 at 21:41

This addition is probably late but if someone stumble on this they should know that SpiceWorks uses prototype.js as the JavaScript library. Therefore to get an element in the DOM you use the $ sign

So in order to get the combobox you use the following syntax

var e = $("#ticket_category_clone");
var category = e.options[e.selectedIndex].text;

How to get a value from a combobox in javascript

3 Answers3