Browser back button - Disable

In my website whenever user clicks on back button of browser it works. I want to stop this functionality. For that have already used two three processes. but no one is working !!!!!!!
1. First Process :

In the Page_Init event I wrote the following:
Response.Cache.SetCacheability(HttpCacheability.NoCache)
Response.Cache.SetExpires(DateTime.Now)

2. Second Process :
In the Page_load event I wrote the following :
Response.Cache.SetCacheability(HttpCacheability.NoCache)
Response.Cache.SetExpires(DateTime.Now)

3. Third Process :
In the page_Load event I wrote the following:
Response.Buffer = true;
Response.Expires = 0;
Response.ExpiresAbsolute = DateTime.Now.AddDays( -1 );
Response.CacheControl = "no-cache";

4. I have tried with Javascriot also. it is working fine. But if some user's Browser is Javascriot disabled then following code cannot work.
<script type="text/javascript" language="javascript">
javascript:window.history.forward(1);
</script>

What should I do ?????