#container { width:600px; margin:0px auto; text-align:left; overflow:hidden; position:relative;} //  
  #movie {border:solid 1px #dcdcdc; float:left; width:560px; text-align:left; margin-right:20px;}
  #command { position:relative; height:25px; display:block; margin: 25px 0 0 0;}
  .lightSwitcher {position:absolute; z-index:101; background-image:url(light_bulb_off.png);  
  background-repeat:no-repeat; background-position:left; padding: 0 0 0 20px; outline:none; text-decoration:none;}
  .lightSwitcher:hover {text-decoration:underline;}
  #shadow {background-image:url(shade1x1.png); position:absolute; left:0; top:0; width:100%; z-index:100;}
  .turnedOff {color:#ffff00; background-image:url(light_bulb.png);}
  #clickHere {position:absolute; top: -25px; left:130px;}

<script type="text/javascript" src="jquery-1.3.2.min.js"></script>
  <script type="text/javascript">
  $(document).ready(function(){
  $("#shadow").css("height", $(document).height()).hide();
  $(".lightSwitcher").click(function(){
  $("#shadow").toggle();
  if ($("#shadow").is(":hidden"))
  $(this).html("Выключить свет").removeClass("turnedOff");
  else
  $(this).html("Включить свет").addClass("turnedOff");
  });
   
  });
  </script>

<div id="container">
  <div id="command"><img src="click_here.png" alt="" id="clickHere" /><a class="lightSwitcher" href="#">Выключить свет</a></div>
  <div id="movie">
<!--Ролик для примера -->
  <object width="560" height="340">
  <param name="movie" value="http://www.youtube.com/v/Mlahvvymkxc&hl=en&fs=1&color1=0x3a3a3a&color2=0x999999" />
  <param name="allowFullScreen" value="true" />
  <param name="allowscriptaccess" value="always" />
  <embed src="http://www.youtube.com/v/Mlahvvymkxc&hl=en&fs=1&color1=0x3a3a3a&color2=0x999999"  
  type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="560" height="340">
  </embed>
  </object>
<!--Конец ролика -->
  </div>
</div>
  <div id="shadow"></div>