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="./i/but_home.gif";
name0b=new Image;name0b.src="./i/but_home_h.gif";
name1a=new Image;name1a.src="./i/but_about.gif";
name1b=new Image;name1b.src="./i/but_about_h.gif";
name2a=new Image;name2a.src="./i/but_services.gif";
name2b=new Image;name2b.src="./i/but_services_h.gif";
name3a=new Image;name3a.src="./i/but_portfolio.gif";
name3b=new Image;name3b.src="./i/but_portfolio_h.gif";
name4a=new Image;name4a.src="./i/but_contact.gif";
name4b=new Image;name4b.src="./i/but_contact_h.gif";
name5a=new Image;name5a.src="./i/but_faq.gif";
name5b=new Image;name5b.src="./i/but_faq_h.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;
}
}
function darken2(imgName) {
if (entrance == 'yes'){
imgClick = eval(imgName + 'b.src');
document[imgName].src = imgClick;
}
}