function switchy(div)
{
	var option=['a0', 'a1','a2','a3','a4','a5','a6','a7','a8','a9','a10','a11','a12','a13'];

	for(var i=0; i<option.length; i++)
	{
		obj=document.getElementById(option[i]);
		obj.style.display=(option[i]==div)? "block" : "none";
		//document.getElementById('theuk').style.display='block';
	}
}