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';
}


// 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';

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;}
}

if( entrance == 'yes'){
boton1a = new Image;boton1a.src = 'images/baroff_e_2.gif';
boton1b = new Image;boton1b.src = 'images/baron_e_2.gif';
boton2a = new Image;boton2a.src = 'images/baroff_e_3.gif';
boton2b = new Image;boton2b.src = 'images/baron_e_3.gif';
boton3a = new Image;boton3a.src = 'images/baroff_e_4.gif';
boton3b = new Image;boton3b.src = 'images/baron_e_4.gif';
boton4a = new Image;boton4a.src = 'images/baroff_e_5.gif';
boton4b = new Image;boton4b.src = 'images/baron_e_5.gif';
boton5a = new Image;boton5a.src = 'images/baroff_e_6.gif';
boton5b = new Image;boton5b.src = 'images/baron_e_6.gif';
}
function swap( ob, im )
{
	//alert( ob );
	ob.src = im;
}