if (document.images) {
var navi_0 = new Image()
navi_0.src = "images/navi00.gif";
var navi_0_2 = new Image()
navi_0_2.src = "images/navi00_on.gif";

var navi_1 = new Image()
navi_1.src = "images/navi01.gif";
var navi_1_2 = new Image()
navi_1_2.src = "images/navi01_on.gif";

var navi_2 = new Image()
navi_2.src = "images/navi02.gif";
var navi_2_2 = new Image()
navi_2_2.src = "images/navi02_on.gif";

var navi_3 = new Image()
navi_3.src = "images/navi03.gif";
var navi_3_2 = new Image()
navi_3_2.src = "images/navi03_on.gif";

var navi_4 = new Image()
navi_4.src = "images/navi04.gif";
var navi_4_2 = new Image()
navi_4_2.src = "images/navi04_on.gif";

var navi_5 = new Image()
navi_5.src = "images/navi05.gif";
var navi_5_2 = new Image()
navi_5_2.src = "images/navi05_on.gif";

var navi_6 = new Image()
navi_6.src = "images/navi06.gif";
var navi_6_2 = new Image()
navi_6_2.src = "images/navi06_on.gif";

var navi_7 = new Image()
navi_7.src = "images/navi07.gif";
var navi_7_2 = new Image()
navi_7_2.src = "images/navi07_on.gif";

}

function act(imgName) {
	if (document.images)
	document[imgName].src = eval(imgName + '_2.src')
}

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