Disable back button in of the browser

In this article, I am discussing how to prevent user from navigate to previous page using back button of the browser or the back option in the context menu.
One cannot disable the browser back button functionality only thing that can be done is prevent them.
Below is the JavaScript snippets that needs to be placed in the head section of the page where you don’t want the user to revisit using the back button
<script type = "text/javascript" >
   function preventBack(){window.history.forward();}
    setTimeout("preventBack()", 0);
    window.onunload=function(){null};
</script>

Suppose there are two pages Page1.aspx and Page2.aspx and Page1.aspx redirects to Page2.aspx
Hence to prevent user from visiting Page1.aspx using Back Button you will need to place the above script in the head section of Page1.aspx as shown below.


Writing the code to disable back button

I have tested the script in the following browsers
1.     Internet Explorer 5.55
2.     Internet Explorer 6
3.     Internet Explorer 7
4.     Mozilla Firefox 3
5.     Opera 9
6.     Safari 4
7.     Google Chrome