function genera_ruta( direccio, cp )
{

  if ( direccio.value != "" && cp.value != "" )
  {

	window.open( "http://www.viamichelin.com/viamichelin/esp/dyn/controller/ItiWGPerformPage;jsessionid=0000R42GKMM4JCJ1DTSX1CMTHDI+v1fj8das?strStartAddress=&strStartCityCountry=EUR&strStartCity=" + direccio.value + "&strStartCP=" + cp.value + "&express=true&intItineraryType=1&from=700&strDestCityCountry=EUR&strDestAddress=&strDestCity=viver&strDestCP=08679", "w1");

  }

  if ( direccio.value != "" && cp.value == "" )
  {

	window.open( "http://www.viamichelin.com/viamichelin/esp/dyn/controller/ItiWGPerformPage;jsessionid=0000R42GKMM4JCJ1DTSX1CMTHDI+v1fj8das?strStartAddress=&strStartCityCountry=EUR&strStartCity=" + direccio.value + "&express=true&intItineraryType=1&from=700&strDestCityCountry=EUR&strDestAddress=&strDestCity=viver&strDestCP=08679", "w1");

  }

  if ( direccio.value == "" && cp.value != "" )
  {

	window.open( "http://www.viamichelin.com/viamichelin/esp/dyn/controller/ItiWGPerformPage;jsessionid=0000R42GKMM4JCJ1DTSX1CMTHDI+v1fj8das?strStartAddress=&strStartCityCountry=EUR&strStartCP=" + cp.value + "&express=true&intItineraryType=1&from=700&strDestCityCountry=EUR&strDestAddress=&strDestCity=viver&strDestCP=08679", "w1");

  }

  if ( direccio.value == "" && cp.value == "" )
	alert("Atenció! No es pot buscar un itinerari sense saber el poble o codi postal origen.")

}