var cellHTML='<table width="100%" height="100%" border="0" cellspacing="0" cellpadding="4"><tr><td align="center" valign="middle">Please <a href="?&action=login">Login</a> or <a href="?&action=register">Register</a> to view.</td></tr></table>'

if(pb_username == 'Guest') {
var td=document.getElementsByTagName('td');
for (m=0;m<td.length;m++) {
if(td[m].className=="windowbg2" && td[m].width=="24%" && !td[m].firstChild.innerHTML.match(/(by|on)/)) {
td[m].innerHTML=cellHTML;
}
}
}