thanks Klaus, but this code results in a strange fatal error...

if I enter following code directly in my browser
tour.html?startscene=restaurant&skin_settings.littleplanetintro=false
it's working fine, but when I put this code in my tour in a link in a data file,
<data name="restaurant_de">
<h2>Restaurant</h2>
<p>blabla</p><br />
<a href="tour.html?startscene=restaurant&skin_settings.littleplanetintro=false">Restaurant</a>
</data>
it results in that error.
without adding the skin_settings parameter there is no error....