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Re: Disable Back button. - 10/25/2001 10:51:54 AM
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pagooda
Posts: 54
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Joined: 5/23/2001
From: USA
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I have been a web programmer for years and never been able to disable back button completely, you can however make it harder for your visitors to go back to previous page.
I found this interesting article at irt.org, hope this can help
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Q311 How do I disable the "Back" button of a browser?
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irt.org | Knowledge Base | JavaScript | History | Q311 [ previous next ]
Easy answer - you can't.
Longer answer - you cannot totally remove the ability for the user to go back to the previous location, although you can make it harder.
1) You can use the location replace method when changing the location. This replaces the current history location with the new location. However older browsers do not support this method, which is why it is required to test for the images object:
<script language="JavaScript"><!--
if (document.images)
location.replace('http://www.somewhere.com/apage.html');
else
location.href = 'apage.html';
//--></script>
Note: in Opera replace() will work, but only with absolute URL's.
2) You can load the new location into another window, and then close the old window:
In the first page:
<script langauge="JavaScript"><!--
function newWindow(fileName,windowName) { msgWindow=window.open(fileName,windowName); }
//--></script>
<a href="javascript:newWindow('1.html','window1')">Open Window</a>
In the next window:
<script language="JavaScript"><!--
function newWindow(fileName,windowName) { msgWindow=window.open(fileName,windowName); }
function replaceURL(fileName) { newWindow(fileName,'window2'); self.close(); }
//--></script>
<a href="javascript:replaceURL('2.html')">change location</a>
3) You can open a window without a toolbar:
<script language="JavaScript"><!--
msgWindow=window.open('apage.html','windowName','toolbar=no');
//--></script>
However, this does not totally stop the user from being able to go back to the previous page.
4) You can add code to the previous page to force the browser to go forwards again:
<script language="JavaScript"><!--
javascript:window.history.forward(1);
//--></script>
irt.org | Knowledge Base | JavaScript | History | Q311 [ previous next ]
Q311 How do I disable the "Back" button of a browser?
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RE: Disable Back button. - 10/28/2005 1:46:45 AM
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Snipah
Posts: 1341
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From: Netherlands
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I would opt for the Location.replace (JavaScript)
replace Method
The replace method replaces the current History entry with the specified URL. After calling the replace method, you cannot navigate back to the previous URL using the browser's Back button.
Syntax: location.replace(URL)
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RE: Disable Back button. - 10/29/2005 3:30:58 AM
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TNO
Posts: 1040
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Joined: 12/18/2004
From: thenewobjective.com
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The best way I've come across is, as Snipah said, to use location.replace() for all your links.
you could also do this:
<body onKeydown="if (event.keyCode == 8){return false;}">
You would have to do the same for Alt+Left Arrow as well (Alt == 18, Left == 37). These keyboard shortcuts will differ for each browser.
And for the button on top....have your site load into a popup window to remove it (If you can convince the user to even open a popup window).
Another cheap method is to make a hidden/offscreen input box on the page and use that to capture focus (disabling the backspace key). Using the blur and focus methods you could effectively capture the cursor.
You also have to disable the contextmenu in order to avoid using the back button there:
<body oncontextmenu="return false">
or you can do this on your other pages:
<body onLoad="history.go(+1)">
when the page loads, it will redirect to the page in front of it, and if there isn't a page in front of it, then nothing will happen.
In case the user wants to get smart and turn off javascript and visit your page, put this in your webpage:
<noscript>
<META NAME="Refresh" CONTENT="1; URL=MyOtherPage.html">
</noscript>
Nothing is perfect of course but these should at least get the point across to the avg user
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