change embed src using javascript in asp.net

[gameon]

hey
i am using embed tag for video.
now i want to change my embed src dynamically so i am using javascript but it does not work.
here is my code:
javascript-:

function playvideo()
  {
  
   document.getElementById("play").innerHTML='<embed  id="id" src="./video/1.wmv" />';
   
    
  }

aspx-:

<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="playvideo();" />
    <div id="play">
    <embed  ID="id" src="./video/2.wmv" />
    </div>