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

// BROWSER?

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

}

// VERSION?

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

}

// BROWSER & 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/mc_summer02/mnu1.gif';
name0b = new Image;name0b.src = 'images/mc_summer02/mnu1on.gif';
name0c = new Image;name0c.src = 'images/mnu1_text.gif';
name1a = new Image;name1a.src = 'images/mc_summer02/mnu2.gif';
name1b = new Image;name1b.src = 'images/mc_summer02/mnu2on.gif';
name1c = new Image;name1c.src = 'images/mnu2_text.gif';
name2a = new Image;name2a.src = 'images/mc_summer02/mnu3.gif';
name2b = new Image;name2b.src = 'images/mc_summer02/mnu3on.gif';
name2c = new Image;name2c.src = 'images/mnu3_text.gif';
name3a = new Image;name3a.src = 'images/mc_summer02/mnu4.gif';
name3b = new Image;name3b.src = 'images/mc_summer02/mnu4on.gif';
name3c = new Image;name3c.src = 'images/mnu4_text.gif';
name4a = new Image;name4a.src = 'images/mc_summer02/mnu5.gif';
name4b = new Image;name4b.src = 'images/mc_summer02/mnu5on.gif';
name4c = new Image;name4c.src = 'images/mnu5_text.gif';
name5a = new Image;name5a.src = 'images/mc_summer02/mnu6.gif';
name5b = new Image;name5b.src = 'images/mc_summer02/mnu6on.gif';
name5c = new Image;name5c.src = 'images/mnu6_text.gif';
name6a = new Image;name6a.src = 'images/mc_summer02/mnu7.gif';
name6b = new Image;name6b.src = 'images/mc_summer02/mnu7on.gif';
name6c = new Image;name6c.src = 'images/mnu7_text.gif';
name7a = new Image;name7a.src = 'images/mc_summer02/mnu8.gif';
name7b = new Image;name7b.src = 'images/mc_summer02/mnu8on.gif';
name7c = new Image;name7c.src = 'images/mnu8_text.gif';
name8a = new Image;name8a.src = 'images/mc_summer02/mnu9.gif';
name8b = new Image;name8b.src = 'images/mc_summer02/mnu9on.gif';
name8c = new Image;name8c.src = 'images/mnu9_text.gif';
name9a = new Image;name9a.src = 'images/mc_summer02/mnu10.gif';
name9b = new Image;name9b.src = 'images/mc_summer02/mnu10on.gif';
name9c = new Image;name9c.src = 'images/mnu10_text.gif';

defaultimage = new Image;defaultimage.src = 'images/mnu_text_blank.gif';

}

function lighten(imgName)

{

    if (entrance == 'yes')

    {

        imgOn = eval(imgName + 'b.src');
        document[imgName].src = imgOn;
        imgOn = eval(imgName + 'c.src')
        document.defimage.src = imgOn;

    }

}

function darken(imgName)

{

    if (entrance == 'yes')

    {

        imgOff = eval(imgName + 'a.src');
        document[imgName].src = imgOff;
        document.defimage.src = defaultimage.src;

    }

}