var img_dir = "../images/";
var ddata1,ddata2 ,ddata3;

function cchange( ddata1 , ddata2 ){
	if( ddata2 ==  "on" ){
	ddata3 = img_dir + ddata1 + "_on.gif";
		document.images[ddata1].src = ddata3;
	}
	else{
		document.images[ddata1].src = img_dir + ddata1 + ".gif";
	}
}

function preimg(){
var loadcomp = false;
	var preload = new Array();
	for(i = 0 ; i < preloadlist.length ; i++) {
		preload[i] = new Image();
		preload[i].src = preloadlist[i];
	}
	loadcomp = true;
}

var preloadlist = new Array
	(
	'../images/menu01.gif',
	'../images/menu01_on.gif',
	'../images/menu02.gif',
	'../images/menu02_on.gif',
	'../images/menu03.gif',
	'../images/menu03_on.gif',
	'../images/menu04.gif',
	'../images/menu04_on.gif',
	'../images/menu05.gif',
	'../images/menu05_on.gif',
	'../images/menu06.gif',
	'../images/menu06_on.gif',
	'../images/menu07.gif',
	'../images/menu07_on.gif',
	'../images/menu08.gif',
	'../images/menu08_on.gif',
	'../images/menu09.gif',
	'../images/menu09_on.gif',
	'../images/menu10.gif',
	'../images/menu10_on.gif',
	'../images/menu11.gif',
	'../images/menu11_on.gif'
	);
preimg();