var browser     = '';
var version     = '';
var entrance    = '';
var cond        = '';

if (browser == ''){
if (navigator.appName.indexOf('Microsoft') != -1)
browser = 'IE'
else if (navigator.appName.indexOf('Netscape') != -1)
browser = 'Netscape'
else browser = 'NN';
}

if (version == ''){
version= navigator.appVersion;
paren = version.indexOf('(');
whole_version = navigator.appVersion.substring(0,paren-1);
version         = parseInt(whole_version);
}

if (browser == 'IE' && version >= 4) entrance = 'yes';
if (browser == 'IE' && version < 4) entrance = 'no';
if (browser == 'Netscape' && version >= 2.02) entrance = 'yes';
if (browser == 'Netscape' && version < 2.02) entrance = 'no';
if (entrance=='yes'){
	name0a = new Image;name0a.src = '../images/menu/CHmenu01.gif';
	name0b = new Image;name0b.src = '../images/menu/CHmenu01on.gif';
	name1a = new Image;name1a.src = '../images/menu/CHmenu02.gif';
	name1b = new Image;name1b.src = '../images/menu/CHmenu02on.gif';    
	name2a = new Image;name2a.src = '../images/menu/CHmenu03.gif';
	name2b = new Image;name2b.src = '../images/menu/CHmenu03on.gif';
	name3a = new Image;name3a.src = '../images/menu/CHmenu04.gif';
	name3b = new Image;name3b.src = '../images/menu/CHmenu04on.gif';
	name4a = new Image;name4a.src = '../images/menu/CHmenu05.gif';
	name4b = new Image;name4b.src = '../images/menu/CHmenu05on.gif';
	name5a = new Image;name5a.src = '../images/menu/CHmenu06.gif';
	name5b = new Image;name5b.src = '../images/menu/CHmenu06on.gif';
	name6a = new Image;name6a.src = '../images/menu/CHmenu07.gif';
	name6b = new Image;name6b.src = '../images/menu/CHmenu07on.gif';
	name7a = new Image;name7a.src = '../images/menu/CHmenu08.gif';
	name7b = new Image;name7b.src = '../images/menu/CHmenu08on.gif';    
	name8a = new Image;name8a.src = '../images/menu/CHmenu09.gif';
	name8b = new Image;name8b.src = '../images/menu/CHmenu09on.gif';
	name9a = new Image;name9a.src = '../images/menu/CHmenu10.gif';
	name9b = new Image;name9b.src = '../images/menu/CHmenu10on.gif';
	name10a = new Image;name10a.src = '../images/menu/CHmenu11.gif';
	name10b = new Image;name10b.src = '../images/menu/CHmenu11on.gif';
	name11a = new Image;name11a.src = '../images/menu/CHmenu12.gif';
	name11b = new Image;name11b.src = '../images/menu/CHmenu12on.gif';
}
function lighten(imgName) {
if (entrance == 'yes'){
imgOn = eval(imgName + 'b.src');
document[imgName].src = imgOn;}
}
function darken(imgName) {
if (entrance == 'yes'){
imgOff = eval(imgName + 'a.src');
document[imgName].src = imgOff;}
 }