RemoveDisable javascript when using browser's back button - Stack Overflow

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I have a page that consists of two frames: one being a flash app, and one being an aspx page with a user control that contains a grid with several "add to cart" buttons. When the user clicks a button I would like to reload the whole window with a shopping cart page.

I found out how to do so here quite nicely by avoiding response.redirect, and using response.write to insert some javascript that redirects. The problem is that when the user hits the back button from the shopping cart page, the script executes again, effectively canceling out the back button. (bad usability)

So my question is, is there a way to detect if the user arrived at the page via the back button and avoid executing the script?

I have a page that consists of two frames: one being a flash app, and one being an aspx page with a user control that contains a grid with several "add to cart" buttons. When the user clicks a button I would like to reload the whole window with a shopping cart page.

I found out how to do so here quite nicely by avoiding response.redirect, and using response.write to insert some javascript that redirects. The problem is that when the user hits the back button from the shopping cart page, the script executes again, effectively canceling out the back button. (bad usability)

So my question is, is there a way to detect if the user arrived at the page via the back button and avoid executing the script?

• javascript

Share Improve this question Follow edited Jun 10, 2011 at 8:29 kazim 2,19111 gold badge1919 silver badges1515 bronze badges asked Apr 16, 2009 at 18:07 personaelitpersonaelit 1,65333 gold badges3232 silver badges5959 bronze badges 4

• 1 Bad usability and frames and a flash app in the same question? – alex Commented Apr 17, 2009 at 1:03
• And why are you using JavaScript for basic page navigation? As Andrew Duffy has mentioned, that's what the "target" attribute is for. – Calvin Commented Apr 17, 2009 at 2:47
• @alex -- Just because frames and flash are generally considered bad design, are over used, and are used incorrectly, it doesn't mean that there aren't legitimate uses for them. @Calvin -- the reason javascript is necessary for basic navigation, is because when using Response.Redirect from within my code, there is no way to specify a target since that is all handled by the client. So writing a script to the page that does the redirect for me allows me to specify a target. – personaelit Commented Apr 17, 2009 at 14:34
• I would only call them bad design because of their accessibility issues. For a start... – alex Commented Apr 18, 2009 at 4:26

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3 Answers 3

Sorted by: Reset to default 11

Change your javascript to replace the current URL instead of just setting it

// Creates browser history
top.location = 'http://www.stackoverflow.'

// Doesn't create browser history
top.location.replace( 'http://www.stackoverflow.' );

When the user clicks a button I would like to reload the whole window with a shopping cart page.

You should be using the Post-Redirect-Get model.

You can do this easily without using script by making the buttons submit buttons in a form with a target attribute of _top. Note that the target attribute will not validate as HTML4 or XHTML.

If you are using a POST request to submit to the shopping cart (a good idea) then the Post-Redirect-Get idiom mentioned by bobince will strengthen your application further - the user won't be prompted to resubmit the form if they use the back or forward buttons to get to your shopping cart page.

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