if (document.images) {
var snav_01 = new Image()
snav_01.src = "../images/navi_local_prop_01_off.gif";
var snav_01_b = new Image()
snav_01_b.src = "../images/navi_local_prop_01_on.gif";

var snav_02 = new Image()
snav_02.src = "../images/navi_local_prop_02_off.gif";
var snav_02_b = new Image()
snav_02_b.src = "../images/navi_local_prop_02_on.gif";

var snav_03 = new Image()
snav_03.src = "../images/navi_local_prop_03_off.gif";
var snav_03_b = new Image()
snav_03_b.src = "../images/navi_local_prop_03_on.gif";

var snav_04 = new Image()
snav_04.src = "../images/navi_local_prop_04_off.gif";
var snav_04_b = new Image()
snav_04_b.src = "../images/navi_local_prop_04_on.gif";

}

function act(imgName) {
	if (document.images)
	document[imgName].src = eval(imgName + '_b.src')
}

function inact(imgName) {
	if (document.images)
	document[imgName].src = eval(imgName + '.src')
}