  jQuery: 

  <!DOCTYPE>:  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


    

:

 - <div class="fvid_on"></div>

 - <div class="fvid_off"></div>