Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
<!--
function toggle(id,display){
document.getElementById(id).style.display = display;
}
//-->
</script>
<div class="post_header" onClick="toggle('floatingBox','block');">
<div class="post_pmbutton" id="button_<%=num%>">[+]</div>
<br clear="all">
</div>
<div class="post_content" style="display: none;" id="floatingBox">
<div id="floatingBox">some words here
<a href="javascript:toggle('floatingBox','none');" title="Close this box" >[I Agree]</a>
</div>
</div>
</body>
</html>