Question

Get (and change) the text of an item within a dropdown list using javascript

Asked by: g-spot

I need to get at and change the text of a list item within a dropdown list. The code Ive written works in IE but does not work at all in Firefox. The below works in IE but not Firefox.

How can I get it to work in Firefox?

document.forms['formIQuote'].TripType.options(0).text = document.forms['form'].TripType.options(0).value + " (with Golf cover)";

                                  
1:

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Asked On
2009-08-24 at 08:08:24ID24676790
Tags

javascript firefox

Topics

JavaScript

,

Firefox Web Browser

Participating Experts
2
Points
250
Comments
9

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Answers

 

by: HonorGodPosted on 2009-08-24 at 08:25:09ID: 25169273

What is the HTML of the code that you are trying to modify?

 

by: g-spotPosted on 2009-08-24 at 08:28:29ID: 25169316

<form name="formIQuote" id="formIQuote" method="post" action="/quote/" onsubmit="return validateFormOnSubmit(this);">
<select id="TripType" name="TripType" class="selectfield"  onchange="checkTripType();">
<option value="SingleTrip" >Single Trip</option>
<option value="Annual" >Annual</option>
 </select>
</form>

 

by: HonorGodPosted on 2009-08-24 at 08:45:12ID: 25169476

I would use something like this

<html>
<head>
<script type="text/javascript">
  function field( id ) {
    var ele = document.getElementById( id );
    if ( !ele ) {
      alert( 'Specified element not found. id="' + id + '"' );
    }
    return ele;
  }
  function change() {
    var here = field( 'TripType' );
    var SI   = here.selectedIndex;
    alert( here.options[ SI ].value );
    here.options[ SI ].text += ' something else';
  }
</script>
</head>
<body>
 
<form name="formIQuote" id="formIQuote" method="post" action="/quote/" onsubmit="return validateFormOnSubmit(this);">
<select id="TripType" name="TripType" class="selectfield"  onchange="checkTripType();">
<option value="SingleTrip" >Single Trip</option>
<option value="Annual" >Annual</option>
 </select>
</form>
<input type='button' value='Change' onclick='change()'>
 
</body>
</html>

                                              
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by: g-spotPosted on 2009-08-24 at 08:54:56ID: 25169582

This seems to work:
        var e = document.getElementById("TripType");
        for (var i = 0, limit = e.options.length; i < limit; i++) {
            e.options[i].text = e.options[i].value + " (with Golf cover)";
        }

 

by: HonorGodPosted on 2009-08-24 at 08:57:43ID: 25169618

g-spot: I would hesitate to use current value of "e.options[i].value" because it could be totally different from "e.options[i].text";

Or was that a typographical error?

Did you mean to use:

e.options[i].text = e.options[i].text + " (with Golf cover)";

                                              
1:

Select allOpen in new window

 

by: mplungjanPosted on 2009-08-24 at 12:12:53ID: 25171404

options is an array [] in all browsers and also a collection in IE ()

So

document.forms['formIQuote'].TripType.options[0].text = document.forms['form'].TripType.options[0].value + " (with Golf cover)";

will work

 

by: g-spotPosted on 2009-08-25 at 01:01:55ID: 25175311

The reason why i used:

e.options[i].text = e.options[i].value + " (with Golf cover)";

was that if I used

e.options[i].text = e.options[i].text + " (with Golf cover)";

every time I called the function, " (with Golf cover)" would be added to the text resulting in:

" (with Golf cover)  (with Golf cover)   (with Golf cover)  (with Golf cover) "

 

by: mplungjanPosted on 2009-08-25 at 01:12:39ID: 25175366

Why call it more than once...

Anyway you can do

function addText(sel,text) {
 for (var i = 0, limit = sel.options.length; i < limit; i++) {
   var txt = sel.options[i].text;
   if (txt.indexOf(text) !=-1) continue;
   sel.options[i].text += text;
 }
}

addText(document.getElementById("TripType")," (with Golf cover)")

 

by: g-spotPosted on 2009-08-25 at 01:49:05ID: 25175552

Hi mplungjan

That is just perfect. Thanks

G.

20120131-EE-VQP-002

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