so it would be

 

<script src='/CuteSoft_Client/CuteChat/IntegrationUtility.js.aspx'></script>
   <img src="http://cutesoft.net/CuteSoft_Client/CuteChat/images/icon_invite.gif" align=absmiddle><a href="###" onclick=Chat_OpenMessenger()" >Messenger</a>

 

correct