/*************************************/
/*   表紙の背景絵を切り替え
/************************************/
var trick_flg=0;
function trick_entame() {
	if (trick_flg==0) {
		document.getElementById('drag_area').style.backgroundImage = "url(http://www.freelifec.com/images/msg/budda1_hv_800_180.gif)";
		trick_flg=1;
	} else {
		document.getElementById('drag_area').style.backgroundImage = "url(http://www.freelifec.com/images/msg/budda1_800_180.gif)";
		trick_flg=0;
	}
}

var tree_flg=0;
function changeTreehouse() {
	if (tree_flg==0) {
		document.getElementById('tree_house').style.backgroundImage = "url(http://www.freelifec.com/images/tree_house_serif_432_518.gif)";
		tree_flg=1;
	} else {
		document.getElementById('tree_house').style.backgroundImage = "url(http://www.freelifec.com/images/tree_house_432_518.gif)";
		tree_flg=0;
	}
	
}