/* map change */
function mapImage (el){
	document.getElementById('mapimage').src = el;
}

function mapImageOff (){
	document.getElementById('mapimage').src = "images/index_il01.gif";
}

/* area show */
function showLayer(target){
	document.getElementById(target).style.display='block';
}
function hideLayer(target){
	document.getElementById(target).style.display='none';
}