How to register an XPCOM component during install

Hello everybody,
    I am trying to use XPCOM object through the Javascript code in an xbl file. I want to register both the xpcom object and the xbl file for use at the client side. 
    I am trying to bind an HTML input element with an xbl binding. For this I have a binding code in the html file.

    Partial HTML File

    .MyInput   
    {
        -moz-binding:url("chrome://SamTest/Binding.xbl#Myinput");
    }
     
    <input   class=MyInput />

    Partial XBL File

    :
    :
    <bindings>    
        <binding>
              <content>
                 <children/>
              </content>
              <implementation>
               <constructor>
                    :
                    :
                     JavaScript code for creating a xpcom object
                       and calling its method.
                    :
                </constructor>
                </implementation>
        </binding>
    </bindings>
    This type of structure works for local file. ie. if I place both files in a directory on client and try opening in the Netscape brower. But it doesn't work when I shift the application files to web ie keep on the webserver.
    Looking forward for a reply.
Regards
Ajit Anvekar