The Skype protocol allows users to deal with Skype related activities. The only condition is to have installed Skype in client side. Getting a call, sending a IM, sending a voicemail and having a conference call are still possible when the Skype username is known.
The following examples use ‘echo123’ demo user provided by Skype. Replace it with your friend’s Skype username.
Call a Skype user
<a href="skype:echo123?call">call Skype demo user</a>
Send a Skype IM message
<a href="skype:echo123?chat">Chat with Skype demo user</a>
Send a voicemail
<a href="skype:echo123?voicemail">Send voicemail to demo user</a>
Create a Skype conference call
<a href="skype:echo123;ANOTHER_USER?call">conference call</a>