<?php $_id = 'id_' . md5(microtime()) ?>
<input type="hidden" name="<?php echo $this->getInputElementName()?>"  value="" id="<?php echo $_id?>" />
<script type="text/javascript">
// create serializer controller, that will syncronize grid checkboxes with hidden input
new productLinksController('<?php echo $_id?>', <?php echo $this->getProductsJSON() ?>, <?php echo $this->getGridBlock()->getJsObjectName() ?>);
</script>
