- '<input type="button" value="' . _("Print") . '" onClick="printPopup()"> '.
- '<input type="button" value="' . _("Close") . '" onClick="window.parent.close()">'.
+ '<input type="button" value="' . _("Print") . '" onclick="printPopup()" /> '.
+ '<input type="button" value="' . _("Close") . '" onclick="window.parent.close()" />'.