function showFlash(){
var flashObjects = document.getElementsByTagName("object");
for (i = 0; i < flashObjects.length; i++) {
flashObjects[i].style.visibility = "visible";
}

var flashEmbeds = document.getElementsByTagName("embed");
for (i = 0; i < flashEmbeds.length; i++) {
flashEmbeds[i].style.visibility = "visible";
}
}

// ---------------------------------------------------

function hideFlash(){
var flashObjects = document.getElementsByTagName("object");
for (i = 0; i < flashObjects.length; i++) {
flashObjects[i].style.visibility = "hidden";
}

var flashEmbeds = document.getElementsByTagName("embed");
for (i = 0; i < flashEmbeds.length; i++) {
flashEmbeds[i].style.visibility = "hidden";
}

}

<script language=javascript type='text/javascript'>
function hideDiv() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('hideShow').style.visibility = 'hidden';
}
else {
if (document.layers) { // Netscape 4
document.hideShow.visibility = 'hidden';
}
else { // IE 4
document.all.hideShow.style.visibility = 'hidden';
}
}
}

function showDiv() {
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById('hideShow').style.visibility = 'visible';
}
else {
if (document.layers) { // Netscape 4
document.hideShow.visibility = 'visible';
}
else { // IE 4
document.all.hideShow.style.visibility = 'visible';
}
}
}
</script>

As you can see it gets the div ID for each of the browsers and hides it or shows it. I named the Div Id hideShow to make it easy for you.

Then in your document put in your Div element the id name hideShow you can change this of course

<div id="hideShow" ..etc>
My content
</div>

and this to call the javascript to hide it

<a href="javascript:hideDiv()">Hide Div</a>

and this to show it

<a href="javascript:showDiv()">show Div</a>

<?php

// no direct access
defined('_JEXEC') or die('Restricted access');

if ( ! defined('modMainMenuXMLCallbackDefined') )
{

//class to add class "last" to last li
function addLastClass($result) {
$result = preg_replace("/(.*)<\/li><li class=\"item(\d*)\">(.*)<\/li><\/ul>(.*).*/is", '$1</li><li>$3</li></ul>$4', $result);

return $result;
}

function modMainMenuXMLCallback(&$node, $args)
{
$user    = &JFactory::getUser();
$menu    = &JSite::getMenu();
$active    = $menu->getActive();
$path    = isset($active) ? array_reverse($active->tree) : null;

if (($args['end']) && ($node->attributes('level') >= $args['end']))
{
$children = $node->children();
foreach ($node->children() as $child)
{
if ($child->name() == 'ul') {
$node->removeChild($child);
}
}
}

if ($node->name() == 'ul') {
foreach ($node->children() as $child)
{
if ($child->attributes('access') > $user->get('aid', 0)) {
$node->removeChild($child);
}
}
}

if (($node->name() == 'li') && isset($node->ul)) {
$node->addAttribute('class', 'parent');
}

if (isset($path) && (in_array($node->attributes('id'), $path) || in_array($node->attributes('rel'), $path)))
{
if ($node->attributes('class')) {
$node->addAttribute('class', $node->attributes('class').' active');
} else {
$node->addAttribute('class', 'active');
}
}
else
{
if (isset($args['children']) && !$args['children'])
{
$children = $node->children();
foreach ($node->children() as $child)
{
if ($child->name() == 'ul') {
$node->removeChild($child);
}
}
}
}

if (($node->name() == 'li') && ($id = $node->attributes('id'))) {
if ($node->attributes('class')) {
$node->addAttribute('class', $node->attributes('class').' item'.$id);
} else {
$node->addAttribute('class', 'item'.$id);
}
}

if (isset($path) && $node->attributes('id') == $path[0]) {
$node->addAttribute('id', 'current');
} else {
$node->removeAttribute('id');
}
$node->removeAttribute('rel');
$node->removeAttribute('level');
$node->removeAttribute('access');
}
define('modMainMenuXMLCallbackDefined', true);
}
//get menu code
ob_start();

modMainMenuHelper::render($params, 'modMainMenuXMLCallback');

//add class "last" to last li
$menu_html = ob_get_contents();
ob_end_clean();

echo addLastClass($menu_html);

<!-- Load MooTools by the template, and at the top before any other scripts -->
<?php
/* --- This removes any Joomla default Scripts from the Header Buffer --- */
$header = $this->getHeadData();                   // Get the current HEAD buffer
$header['scripts'] = array();                     // Clear all current 'scripts' entries
$this->setHeadData($header);                      // Update the HEAD buffer
/* --- We add the MooTools Framework manually, see below --- */
?>

<head>
<!-- Load MooTools at first -->
<script type="text/javascript" src="templates/<?php echo $this->template ?>/js/mootools/mootools-1.2.1-core.js"></script>
<script type="text/javascript" src="templates/<?php echo $this->template ?>/js/mootools/mootools-1.2-more.js"></script>
<script type="text/javascript" src="templates/<?php echo $this->template ?>/js/mootools/mootools-1.2-compat.js"></script>

<!-- Now all other scripts from extensions -->
<jdoc:include type="head" />

</head>

$limit = intval( $mainframe->getUserStateFromRequest( "viewlistlimit", 'limit', $mosConfig_list_limit ) );

And change $mosConfig_list_limit to any number of products per page.

<!--[if IE]>
According to the conditional comment this is Internet Explorer<br />
<![endif]-->
<!--[if IE 5]>
According to the conditional comment this is Internet Explorer 5<br />
<![endif]-->
<!--[if IE 5.0]>
According to the conditional comment this is Internet Explorer 5.0<br />
<![endif]-->
<!--[if IE 5.5]>
According to the conditional comment this is Internet Explorer 5.5<br />
<![endif]-->
<!--[if IE 6]>
According to the conditional comment this is Internet Explorer 6<br />
<![endif]-->
<!--[if IE 7]>
According to the conditional comment this is Internet Explorer 7<br />
<![endif]-->
<!--[if gte IE 5]>
According to the conditional comment this is Internet Explorer 5 and up<br />
<![endif]-->
<!--[if lt IE 6]>
According to the conditional comment this is Internet Explorer lower than 6<br />
<![endif]-->
<!--[if lte IE 5.5]>
According to the conditional comment this is Internet Explorer lower or equal to 5.5<br />
<![endif]-->
<!--[if gt IE 6]>
According to the conditional comment this is Internet Explorer greater than 6<br />
<![endif]-->

Warning: Missing argument 2 for vmGet(), called in …/administrator/components/com_virtuemart/classes/ps_shipping.php on line 138 and defined in …/administrator/components/com_virtuemart/classes/request.class.php on line 26

Fix is next:
Go to: administrator/components/com_virtuemart/classes/ps_shipping.php
change the WRONG line 113:

($fields = array( 'shipping_carrier_name' => vmGet($d["shipping_carrier_name"]),)

with this line:

$fields = array( 'shipping_carrier_name' => vmGet($d, 'shipping_carrier_name'),

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<html>
<head>
<title>Internet Explorer: Operation Aborted. Sample error.</title>
</head>
<body>
<table>
<script>
document.body.appendChild(document.createElement('div'))
</script>
</table>
</body>
</html>

There are two ways to avoid this:

1. Run script in windows.onload function:

   <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
    <html>
    <head>
      <title>Internet Explorer: Operation Aborted. Sample solution.</title>
      </head>    <body>
      <ul>
         <script>
          window.onload = function(){
           document.body.appendChild(document.createElement('div'))
         }
     </script>
     </ul>
    </body>
    </html>

2. Or add to javascript tag parameter defer=”defer”:

   <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
   <html>
    <head>
     <title>Internet Explorer: Operation Aborted. Sample error.</title>
    </head>
    <body>
     <table>
       <script defer="defer">
        document.body.appendChild(document.createElement('div'))
         </script>
       </table>
     </body>
    </html>