how to insert a link to a web page with a button?
Hey man see: http://unity3d.com/support/documentation/ScriptReference/Application.OpenURL.html
Depends if you are using the GUI system or a gameobject approach to your interface on the exact details, but basically you just need to call that.
// with parameter
public void toLink(string link){
Application.OpenURL (link);
}
not parameter
public void toLink( ){
Application.OpenURL (“www.exemplo.com”);
}