opentab="home";

function ClickTab(which) {
	showdiv(which,visible);
	showdiv(which+"on",visible);
	showdiv(which+"off",hidden);
	showdiv(opentab,hidden);
	showdiv(opentab+"off",visible);
	showdiv(opentab+"on",hidden);
	opentab=which;
}