navi_01_on = new Image();
navi_01_on.src = "images/navi_01_on.gif";
navi_01_off= new Image();
navi_01_off.src= "images/navi_01_off.gif";

navi_02_on = new Image();
navi_02_on.src = "images/navi_02_on.gif";
navi_02_off= new Image();
navi_02_off.src= "images/navi_02_off.gif";

navi_03_on = new Image();
navi_03_on.src = "images/navi_03_on.gif";
navi_03_off= new Image();
navi_03_off.src= "images/navi_03_off.gif";

navi_04_on = new Image();
navi_04_on.src = "images/navi_04_on.gif";
navi_04_off= new Image();
navi_04_off.src= "images/navi_04_off.gif";

navi_05_on = new Image();
navi_05_on.src = "images/navi_05_on.gif";
navi_05_off= new Image();
navi_05_off.src= "images/navi_05_off.gif";

navi_06_on = new Image();
navi_06_on.src = "images/navi_06_on.gif";
navi_06_off= new Image();
navi_06_off.src= "images/navi_06_off.gif";

navi_07_on = new Image();
navi_07_on.src = "images/navi_01_on_e.gif";
navi_07_off= new Image();
navi_07_off.src= "images/navi_01_off_e.gif";

navi_08_on = new Image();
navi_08_on.src = "images/navi_02_on_e.gif";
navi_08_off= new Image();
navi_08_off.src= "images/navi_02_off_e.gif";

navi_09_on = new Image();
navi_09_on.src = "images/navi_03_on_e.gif";
navi_09_off= new Image();
navi_09_off.src= "images/navi_03_off_e.gif";

navi_10_on = new Image();
navi_10_on.src = "images/navi_04_on_e.gif";
navi_10_off= new Image();
navi_10_off.src= "images/navi_04_off_e.gif";


function imgRoll(imgDocID, mouseMov) {
	if ( mouseMov == "in" ) {
		document.images[imgDocID].src = eval(imgDocID + "_on.src");
	}
	if ( mouseMov == "out" ) {
		document.images[imgDocID].src = eval(imgDocID + "_off.src");
	}
}


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		slice_01_over = newImage("images/navi_01_on.gif");
		slice_02_over = newImage("images/navi_02_on.gif");
		slice_03_over = newImage("images/navi_03_on.gif");
		slice_04_over = newImage("images/navi_04_on.gif");
		slice_05_over = newImage("images/navi_05_on.gif");
		slice_06_over = newImage("images/navi_06_on.gif");
		slice_07_over = newImage("images/navi_07_on.gif");
		slice_08_over = newImage("images/navi_08_on.gif");
		slice_09_over = newImage("images/navi_09_on.gif");
		slice_10_over = newImage("images/navi_10_on.gif");
		preloadFlag = true;
	}
}