Disable your back button

Code to disable your back button on logout page after logging out from page:

Place this code just above the head section of your master page source code(which contains your logout button) and/or also on a page wherever your logout button is placed.

<script type = "text/javascript" >
function disableBackButton() {
window.history.forward();
}
setTimeout("disableBackButton()", 0);
</script>