function area01() {
	var element = document.getElementById("area");
	element.style.backgroundImage = 'url(img/area/area_on_01.gif)';
}
function area02() {
	var element = document.getElementById("area");
	element.style.backgroundImage = 'url(img/area/area_on_02.gif)';
}
function area03() {
	var element = document.getElementById("area");
	element.style.backgroundImage = 'url(img/area/area_on_03.gif)';
}
function area04() {
	var element = document.getElementById("area");
	element.style.backgroundImage = 'url(img/area/area_on_04.gif)';
}
function area05() {
	var element = document.getElementById("area");
	element.style.backgroundImage = 'url(img/area/area_on_05.gif)';
}
function area_reset() {
	var element = document.getElementById("area");
	element.style.backgroundImage = 'url(img/area/area_default.gif)';
}