function cambiaSfondo(id){

	var disp = eval(document.getElementById('principal'));

	if(id == 0)

	{

		disp.style.backgroundImage = 'url(Images/hyosung.jpg)';

	}

	if(id == 1)

	{

		disp.style.backgroundImage = 'url(Images/strada.jpg)';

	}

	if(id == 2)

	{

		disp.style.backgroundImage = 'url(Images/custom.jpg)';

	}

	if(id == 3)

	{

		disp.style.backgroundImage = 'url(Images/offroad.jpg)';

	}

	if(id == 4)

	{

		disp.style.backgroundImage = 'url(Images/quad.jpg)';

	}

	if(id == 5)

	{

		disp.style.backgroundImage = 'url(Images/concessionari.jpg)';

	}

	if(id == 6)

	{

		disp.style.backgroundImage = 'url(Images/contatti.jpg)';

	}

	

	if(id == 7)

	{

		disp.style.backgroundImage = 'url(Images/news.jpg)';

	}

	

	if(id == 8)

	{

		disp.style.backgroundImage = 'url(Images/modelli.jpg)';

	}

	

	if(id == 9)

	{

		disp.style.backgroundImage = 'url(Images/servizi.jpg)';

	}

	if(id == 10)

	{

		disp.style.backgroundImage = 'url(Images/SCOOTERprovv_bkgd.jpg)';

	}
}