function show(content)
{
	document.getElementById("kanji_box_off").style.display = "none";
	document.getElementById("kanji_box_on").style.display = "block";
	document.getElementById("kanji_box_on").innerHTML = content;
}

function hide(div_id)
{
	document.getElementById("kanji_box_on").style.display = "none";
	document.getElementById("kanji_box_off").style.display = "block";
}