Sometimes we have requirement in developing a website to disable the
Back button effect from Browser. This is common in Online Banking
Websites and other sites where security is of principal concern. User
may hit back and navigate from the page and forget to logout.
Hence
sometime it is required that we disable the functionality of Back
button. But unfortunately this is not an easy task. There is no direct
way of dealing with this problem. We can do few hacks to ensure that
user does not get back in the browser.
Following are few tricks
that can be used to disable the back button in browser. Please note that
we do not literally “disable” the back button, but just nullify its
effect is some case and hide it altogether in others.
Open A New Window without Back Button
This one is very crude technique. But in some case it works like
charm. All you have to do is to open the webpage in a new window. This
window doesn’t have back button at all because we have hide the toolbar.
This technique does work in some case but user has still a workaround to navigate to previous page. Most of the browser have options of Back in context menu. Thus user can still right click on the page and click Back to go to previous page. We will shortly see the workaround for this issue also.
This technique does work in some case but user has still a workaround to navigate to previous page. Most of the browser have options of Back in context menu. Thus user can still right click on the page and click Back to go to previous page. We will shortly see the workaround for this issue also.
Following is the code to open webpage in a new window have no toolbar (Back/Next buttons).
window.open ("http://viralpatel.net/blogs/",
"mywindow","status=1,toolbar=0");
Also it is possible to disable the right click on any webpage using Javascript. Add following code in the webpage.
<body oncontextmenu="return false;">
Disable Back functionality using history.forward
This
is another technique to disable the back functionality in any webpage.
We can disable the back navigation by adding following code in the
webpage. Now the catch here is that you have to add this code in all the
pages where you want to avoid user to get back from previous page. For
example user follows the navigation page1 -> page2. And you want to
stop user from page2 to go back to page1. In this case all following
code in page1.
<SCRIPT type="text/javascript">
window.history.forward();
function noBack() { window.history.forward(); }
</SCRIPT>
</HEAD>
<BODY onload="noBack();"
onpageshow="if (event.persisted) noBack();" onunload="">
The above code will trigger history.forward event for page1.
Thus if user presses Back button on page2, he will be sent to page1. But
the history.forward code on page1 pushes the user back to page2. Thus
user will not be able to go back from page1.
Warn User if Back is Pressed
You
may want to warn user if Back button is pressed. This works in most of
the cases. If you have some unsaved form data, you might want to trigger
a warning message to user if Back button is pressed.
Following Javascript snippet will add a warning message in case Back button is pressed:
window.onbeforeunload = function() { return "You work will be lost."; };
Include this in your HTML page to popup a warning message.
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