function fdisplay(a) {
	b=window.document.getElementById(a);
	c=window.document.getElementById(a+"x");
	if(b.className=="") {
		b.style.display="block";
		b.className="visible";
		c.className="selected";
	}
	else {
		b.style.display="none";
		b.className="";
		c.className="";
	}
}