i was checking my competition today and i have found one website that has a lot of backlinks from homepages of other websites. anyway if i check the pages i do not find the link. i only can see it in the html. and it is something like that <div id='bbbc3a16db409fa9eda6fce3d02292eb1'> <a href="hxxp://nameofthesite.com" target="_blank">toys</a> <script>security_modules('bbbc3a16db409fa9eda6fce3d02292eb1');</script> <!-- 802a2cbaf5ba46d31cdee3fb09098df0 --></body> </html> can anybody explain to me how they do this? are they the owner of those other websites? why is the link hidden and not visible on the page?