function show(aa,bb)
{
	document.all.div1.style.display="none";
	document.all.div2.style.display="none";
	document.all.div3.style.display="none";
	document.all.div4.style.display="none";
	document.all.div5.style.display="none";
	document.all.div6.style.display="none";
	document.all.div7.style.display="none";
	document.all.div8.style.display="none";
	
	document.all.nav1.style.display="none";
	document.all.nav2.style.display="none";
	document.all.nav3.style.display="none";
	document.all.nav4.style.display="none";
	document.all.nav5.style.display="none";
	document.all.nav6.style.display="none";
	document.all.nav7.style.display="none";
	document.all.nav8.style.display="none";
	aa.style.display="block";
	bb.style.display="block";
	}