Funziona con IE

codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Untitled</title>
<style type="text/css">
<!--
.pippo {visibility:visible}
-->
</style>

<script language="JavaScript" type="text/javascript">
<!--
function hide(className) {
 for (i=0;i<document.all.length;i++) {
  var curObj = document.all(i);
	if (curObj.className == className) {
	 curObj.style.visibility = 'hidden';
	}
 }
}
//-->
</script>


</head>
<body>

<div class="pippo">bcnksdq  skfiqsf </div>
<div class="pippo">bcnksdq  skfiqsf </div>
<div class="pippo">bcnksdq  skfiqsf </div>
<div class="pippo">bcnksdq  skfiqsf </div>
<div class="pippo">bcnksdq  skfiqsf </div>
<div class="pippo">bcnksdq  skfiqsf </div>
<input type="button" value="clicca" onclick="hide('pippo');">

</body>
</html>