I need to add an "online support" button on my page but instead of creating an online chat I would like to use Skype.
What's the best way to implement this?
Use the Skype URI
In place of the url you pass a command that will be understood by the browser as the execution of an instruction in an external application
<a href='skype:echo123?chat&topic=Teste'>Abrir conversa</a> <a href='skype:echo123?call&topic=Assunto'>Iniciar chamada</a>
In the examples above, echo123 is the skype contact, chat / call is the type of action that skype will perform, and topic is the subject of the call.
You can see more example on skype page
The browser will display a dialog window asking for authorization to launch the application. Something similar to what happens when you click on the magnet link of a torrent, only after that will skype start.