Use a Custom Label in a Custom Link/Button

Question

Is there a way to use a custom label in a javascript custom button ?

for example:

var targetUrl = encodeURI("http://{!$Label.targetHost}/what/ever?user={!$User.Username}");

Answer 1

That should work fine. I just tested in my org with a custom label called Label with the following Javascript on a custom button:

alert('{!$Label.Label}');

The text I had set up was 'Sample' and when I clicked the custom button on my object it correctly alerted the word Sample.

Are you experiencing something different?

Answer 2

This will work, since before displaying web page, all labels tags ("{!$Label.labelName}") will be replace with text values. On page load javascript will be executed with text values.

Although in your example I would consider using custom settings for storing variables such as target host.