[Javascript] Need Javascript logic for going to homepage if the previous history not available

[Paul Novitski]

At 8/29/2008 07:39 PM, Rajaram Sahasranaman wrote:
>In my aspx page, I have two tabs. I have written a javascript in such a way
>that if the user clicks on first tab, it will go to the previous page
>visited and that will be the required behaviour which is working perfectly
>fine.
>
>Sometimes the previous history will not be available. In the sense, there is
>an option that the user can directly visit the page by making changes in the
>url without going to login and home page. In such a case, I need to show the
>user the home page. How will I do that? Can anybody provides any logic to me
>for this?


         if (history && history.length > 1)
         {
                 sDestination = 'index.php';
         }
         else
         {
                 sDestination = 'somewhere-else.php';
         }

It's always helpful to consult the source:
http://developer.mozilla.org/en/DOM/window.history

I don't know if testing for the existence of the history object is 
really necessary since it appears to be created by default in current 
browsers, but I might toss it in just in case the executing browser 
doesn't support it so that "history.length > 1" doesn't crash the browser.

As always, a javascript navigation system like this should be backed 
up by redundant or fall-back server-side navigation so that in the 
absence of an operational javascript interpreter the page doesn't 
break.  Javascript is the icing, not the cake, and in my view should 
not be relied upon to provide core functionality for publicly-accessible pages.

Regards,

Paul
__________________________

Paul Novitski
Juniper Webcraft Ltd.
http://juniperwebcraft.com