nets='img/center.png';
expl='img/center.gif';

if (navigator.appName == 'Microsoft Internet Explorer') {p=2;} else {p=3;}
if (window.opera) p=1;


switch (p) {
case 1: document.write('<p style="background:url(img/center.png); background-repeat: no-repeat"><img src=img/center.gif width="310" height="310"></p>'); break;
case 2: document.write('<img src=img/center.gif width="310" height="310" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=img/center.png)">'); break;
case 3: document.write('<p style="background:url(img/center.png); background-repeat: no-repeat"><img src=img/center.gif width="310" height="310"></p>'); break;
}

/*
if (window.opera):
document.write('<p style="background:url(img/center.png); background-repeat: no-repeat"><img src=img/center.gif width="310" height="310"></p>');
elseif (navigator.appName=='Microsoft Internet Explorer'):
document.write('<img src=img/center.gif width="310" height="310" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=img/center.png)">');
else: document.write('<p style="background:url(img/center.png); background-repeat: no-repeat"><img src=img/center.gif width="310" height="310"></p>');
endif;
*/