if ((navigator.appName.indexOf('Microsoft')+1)) {
document.write('<style type="text/css"> .bild_dunkel {filter:alpha(opacity=75)} .bild_hell {filter:alpha(opacity=100)} </style>'); }
if ((navigator.appName.indexOf('Netscape')+1)) {
document.write('<style type="text/css"> .bild_dunkel {-moz-opacity:0.75} .bild_hell {-moz-opacity:1} </style>'); }
else {
document.write(''); }