if ((navigator.appName.indexOf('Microsoft')+1)) { 
document.write('<style type="text/css"> .opacity1 {filter:alpha(opacity=100)} .opacity2 {filter:alpha(opacity=80)} </style>'); } 


// autodetekcja dla netscape i Firefox
if ((navigator.appName.indexOf('Netscape')+1))  { 
document.write('<style type="text/css"> .opacity1 {opacity:1;} .opacity2 {opacity:0.8;} </style>'); }

if ((navigator.appName.indexOf('Opera')+1)) { 
document.write('<style type="text/css"> .opacity1 {opacity:1;} .opacity2 {opacity:0.8;} </style>'); }

else { 
document.write(''); }