function unhide1() {
	var item1 = document.getElementById("item1");
	var item2 = document.getElementById("item2");
	var item3 = document.getElementById("item3");
	item1.className=(item1.className=='hidden')?'unhidden':'hidden';
	item2.className='hidden';
	item3.className='hidden';
	var button1 = document.getElementById("button1");
	var button2 = document.getElementById("button2");
	var button3 = document.getElementById("button3");
	button1.className=(button1.className=='current')?'noncurrent':'current';
	if (button2) button2.className='noncurrent';
	if (button3) button3.className='noncurrent';
}

function unhide2() {
	var item1 = document.getElementById("item1");
	var item2 = document.getElementById("item2");
	var item3 = document.getElementById("item3");
	item2.className=(item2.className=='hidden')?'unhidden':'hidden';
	item1.className='hidden';
	item3.className='hidden';
	var button1 = document.getElementById("button1");
	var button2 = document.getElementById("button2");
	var button3 = document.getElementById("button3");
	button2.className=(button2.className=='current')?'noncurrent':'current';
	if (button1) button1.className='noncurrent';
	if (button3) button3.className='noncurrent';
}

function unhide3() {
	var item1 = document.getElementById("item1");
	var item2 = document.getElementById("item2");
	var item3 = document.getElementById("item3");
	item3.className=(item3.className=='hidden')?'unhidden':'hidden';
	item1.className='hidden';
	item2.className='hidden';
	var button1 = document.getElementById("button1");
	var button2 = document.getElementById("button2");
	var button3 = document.getElementById("button3");
	button3.className=(button3.className=='current')?'noncurrent':'current';
	if (button2) button2.className='noncurrent';
	if (button1) button1.className='noncurrent';
}